[BUG] Page sometimes blanks out and won't load with a refresh

[called2voyage]

Sometimes when I have Taiga open in my browser [Brave 1.44.108 Chromium: 106.0.5249.103 (Official Build) (64-bit) running on Ubuntu 20.04.5 LTS (Focal Fossa)] the whole page goes blank, and when I refresh it never reloads. I have to completely close the tab and open a new tab and navigate back to tree.taiga.io.

How can we reproduce the behavior
Open taiga in the browser, navigate to the profile page (tree.taiga.io/profile), and then leave it open for a while. I change tabs frequently, so you may have to do that and come back to reproduce.

Workarounds
Yes, I can still use Taiga. My workaround is to close the tab and open a new tab and navigate back to root (tree.taiga.io).

Taiga environment
Taiga.io

Desktop (please complete the following information):

• OS: Ubuntu 20.04.5 LTS (Focal Fossa)
• Browser: Brave 1.44.108 Chromium: 106.0.5249.103 (Official Build) (64-bit)
• Version: Taiga.io

[Xaviju]

Hi @called2voyage I was unable to reproduce this in my Brave browser [Version 1.45.113 Chromium: 107.0.5304.62 (Official Build) (64-bit)]. I'll keep trying.
In the meanwhile, could you share any errors displayed in the developer tools when the page goes blank, if any?

[called2voyage]

Yes, I'll try to get you something later today.

[called2voyage]

@Xaviju Nothing shows up in the developer tools.

[Xaviju]

Since I am not able to reproduce it, I'll leave this issue open to get more feedback or new ways to reproduce it.
Another test I could think of is to try to reproduce this error on a private window to discard any third-party unexpected effects, as installed plugins.

Thanks for the test.

[called2voyage]

My Brave automatically updated to Version 1.45.116 Chromium: 107.0.5304.91 (Official Build) (64-bit), and so far I haven't noticed this error. I'm gonna give it a day, just to be sure. If the error still hasn't popped up by tomorrow, I'll let you know.

[Xaviju]

Great news @called2voyage 🥳
I'm closing it for now, please feel free to reopen it if the error persists,

[called2voyage]

It happened again, but it only happened in the tab open in my main window, not in the private window, so I think you're probably right about the third-party unexpected effects.

[tril0byte]

@called2voyage - were you signed in in the private window? This is reproducible for me when signed in in incognito.
I use Ungoogled-Chromium instead of Brave. https://github.com/ungoogled-software/ungoogled-chromium#feature-overview
I posted detailed logs in the taiga version of this issue at https://tree.taiga.io/project/taiga/issue/5077 and would like it re-opened.

[called2voyage]

@tril0byte Yes, I was signed in in the private browsing window. Though to be clear, I had the problem in a regular window, and the private window did not have the problem in my case.

[tril0byte]

my logs indicate unable to connect a websocket to api.taiga.io but it keeps retrying dozens of times. I'm not sure what the websocket does since taiga works, but I presume it freezes the tab after enough failures to connect. Unless this is a red herring, then let me know what else to look at. Thanks.

[tril0byte]

@called2voyage Can you re-open this issue since it's basically the same one I have? I can't do it without making a brand new one.

It happens every day for me with every Taiga tab so I have to re-open them all. It's just not conducive to long-term working on a project. I will start looking for another taskboard if I can't get this fixed. I suspect no one has seen my Javascript errors I posted (link above) because I'm commenting on this closed issue. Thank you!

[called2voyage]

@tril0byte I didn't close it, so @Xaviju would have to reopen it. I would definitely support reopening it since I continue to have this problem in the main browser.

[tril0byte]

weird, he asked you to re-open it if it recurs. Anyways.. try hitting F12 and going to console before you leave the tab open for a while, see if you get the same errors about websockets as I do.

[Xaviju]

Hi @tril0byte the sockets error you mention could be caused by a self-hosted installation where you did not install taiga-events.
This seems a different issue (I am guessing you have a self-hosted installation) so I suggest you to open a new issue and reference this if you think it's related.

[Xaviju]

@called2voyage You are still having the same issue in a private window? If it's not happening in a private window, it's hard to reproduce and fix because it can be caused by literally any plugin out there.
Let me know (I thought you were able to reopen the issue)

[tril0byte]

Hi @tril0byte the sockets error you mention could be caused by a self-hosted installation where you did not install taiga-events. This seems a different issue (I am guessing you have a self-hosted installation) so I suggest you to open a new issue and reference this if you think it's related.

Using tree.taiga.io. Sounds like I'm the only one with this issue so unless any ideas to test I'll use Firefox for Taiga. Unless called2voyage sees the same websocket errors I will assume something in my odd environment is the culprit.

[Xaviju]

I see @tril0byte lets see if @called2voyage is having the same issue.
Seems like your browser is blocking websockets for some reason. But since websockets are not required, it is probably not the issue.

[tril0byte]

This is reproducible for me when signed in in incognito. I use Ungoogled-Chromium instead of Brave. https://github.com/ungoogled-software/ungoogled-chromium#feature-overview

@Xaviju see above in answer to your q

Ungoogled chromium may share some code with Brave? The idea is to block all communication with Google, but I dont think api.taiga.io should be blocked. If the websocket errors are unrelated, I seem to need to debug a frozen tab while it's running, which I have no idea how to do.

[Xaviju]

see above in answer to your q

yeah, sorry, I responded before I re-read the whole thread.
Will try with this browser, seems to work fine for me in Brave so far.

[called2voyage]

@Xaviju I was finally able to reproduce this in private browsing this morning. Console is still empty though.

[called2voyage]

@Xaviju I finally got the error log for you:

e.setupConnection @ app.js:5205
t @ lodash.js:4949
e @ raven.js:444
value @ elements.js:1
value @ elements.js:1
value @ elements.js:1
invoke @ elements.js:1
t.args.<computed> @ elements.js:1
angular.js:14195 WebSocket error: [object Event]
(anonymous) @ angular.js:14195
e.onError @ app.js:5451
t @ lodash.js:4949
e @ raven.js:444
value @ elements.js:1
value @ elements.js:1
value @ elements.js:1
o @ elements.js:1
v @ elements.js:1
error (async)
a @ elements.js:1
value @ elements.js:1
value @ elements.js:1
value @ elements.js:1
(anonymous) @ elements.js:1
(anonymous) @ raven.js:1270
e.setupConnection @ app.js:5208
t @ lodash.js:4949
e @ raven.js:444
value @ elements.js:1
value @ elements.js:1
value @ elements.js:1
invoke @ elements.js:1
t.args.<computed> @ elements.js:1
setTimeout (async)
l @ elements.js:1
value @ elements.js:1
value @ elements.js:1
value @ elements.js:1
w @ elements.js:1
(anonymous) @ elements.js:1
T.r.<computed> @ elements.js:1
(anonymous) @ raven.js:1201
e.onClose @ app.js:5460
t @ lodash.js:4949
e @ raven.js:444
value @ elements.js:1
value @ elements.js:1
value @ elements.js:1
o @ elements.js:1
v @ elements.js:1
11WebSocket connection to '<URL>' failed: WebSocket is closed before the connection is established.
app.js:5221 WebSocket connection to 'wss://api.taiga.io/events' failed: WebSocket is closed before the connection is established.
e.stopExistingConnection @ app.js:5221
t @ lodash.js:4949
e.setupConnection @ app.js:5193
t @ lodash.js:4949
e @ raven.js:444
value @ elements.js:1
value @ elements.js:1
value @ elements.js:1
invoke @ elements.js:1
t.args.<computed> @ elements.js:1
setTimeout (async)
l @ elements.js:1
value @ elements.js:1
value @ elements.js:1
value @ elements.js:1
w @ elements.js:1
(anonymous) @ elements.js:1
T.r.<computed> @ elements.js:1
(anonymous) @ raven.js:1201
e.onClose @ app.js:5460
t @ lodash.js:4949
e @ raven.js:444
value @ elements.js:1
value @ elements.js:1
value @ elements.js:1
o @ elements.js:1
v @ elements.js:1
app.js:5221 WebSocket connection to 'wss://api.taiga.io/events' failed: WebSocket is closed before the connection is established.
e.stopExistingConnection @ app.js:5221
t @ lodash.js:4949
e.setupConnection @ app.js:5193
t @ lodash.js:4949
e @ raven.js:444
value @ elements.js:1
value @ elements.js:1
value @ elements.js:1
invoke @ elements.js:1
t.args.<computed> @ elements.js:1
setTimeout (async)
l @ elements.js:1
value @ elements.js:1
value @ elements.js:1
value @ elements.js:1
w @ elements.js:1
(anonymous) @ elements.js:1
T.r.<computed> @ elements.js:1
(anonymous) @ raven.js:1201
e.onClose @ app.js:5460
t @ lodash.js:4949
e @ raven.js:444
value @ elements.js:1
value @ elements.js:1
value @ elements.js:1
o @ elements.js:1
v @ elements.js:1
app.js:5221 WebSocket connection to 'wss://api.taiga.io/events' failed: WebSocket is closed before the connection is established.
e.stopExistingConnection @ app.js:5221
t @ lodash.js:4949
e.setupConnection @ app.js:5193
t @ lodash.js:4949
e @ raven.js:444
value @ elements.js:1
value @ elements.js:1
value @ elements.js:1
invoke @ elements.js:1
t.args.<computed> @ elements.js:1
setTimeout (async)
l @ elements.js:1
value @ elements.js:1
value @ elements.js:1
value @ elements.js:1
w @ elements.js:1
(anonymous) @ elements.js:1
T.r.<computed> @ elements.js:1
(anonymous) @ raven.js:1201
e.onClose @ app.js:5460
t @ lodash.js:4949
e @ raven.js:444
value @ elements.js:1
value @ elements.js:1
value @ elements.js:1
o @ elements.js:1
v @ elements.js:1
app.js:5221 WebSocket connection to 'wss://api.taiga.io/events' failed: WebSocket is closed before the connection is established.
e.stopExistingConnection @ app.js:5221
t @ lodash.js:4949
e.setupConnection @ app.js:5193
t @ lodash.js:4949
e @ raven.js:444
value @ elements.js:1
value @ elements.js:1
value @ elements.js:1
invoke @ elements.js:1
t.args.<computed> @ elements.js:1
setTimeout (async)
l @ elements.js:1
value @ elements.js:1
value @ elements.js:1
value @ elements.js:1
w @ elements.js:1
(anonymous) @ elements.js:1
T.r.<computed> @ elements.js:1
(anonymous) @ raven.js:1201
e.onClose @ app.js:5460
t @ lodash.js:4949
e @ raven.js:444
value @ elements.js:1
value @ elements.js:1
value @ elements.js:1
o @ elements.js:1
v @ elements.js:1
app.js:5221 WebSocket connection to 'wss://api.taiga.io/events' failed: WebSocket is closed before the connection is established.
e.stopExistingConnection @ app.js:5221
t @ lodash.js:4949
e.setupConnection @ app.js:5193
t @ lodash.js:4949
e @ raven.js:444
value @ elements.js:1
value @ elements.js:1
value @ elements.js:1
invoke @ elements.js:1
t.args.<computed> @ elements.js:1
setTimeout (async)
l @ elements.js:1
value @ elements.js:1
value @ elements.js:1
value @ elements.js:1
w @ elements.js:1
(anonymous) @ elements.js:1
T.r.<computed> @ elements.js:1
(anonymous) @ raven.js:1201
e.onClose @ app.js:5460
t @ lodash.js:4949
e @ raven.js:444
value @ elements.js:1
value @ elements.js:1
value @ elements.js:1
o @ elements.js:1
v @ elements.js:1
app.js:5221 WebSocket connection to 'wss://api.taiga.io/events' failed: WebSocket is closed before the connection is established.
e.stopExistingConnection @ app.js:5221
t @ lodash.js:4949
e.setupConnection @ app.js:5193
t @ lodash.js:4949
e @ raven.js:444
value @ elements.js:1
value @ elements.js:1
value @ elements.js:1
invoke @ elements.js:1
t.args.<computed> @ elements.js:1
setTimeout (async)
l @ elements.js:1
value @ elements.js:1
value @ elements.js:1
value @ elements.js:1
w @ elements.js:1
(anonymous) @ elements.js:1
T.r.<computed> @ elements.js:1
(anonymous) @ raven.js:1201
e.onClose @ app.js:5460
t @ lodash.js:4949
e @ raven.js:444
value @ elements.js:1
value @ elements.js:1
value @ elements.js:1
o @ elements.js:1
v @ elements.js:1
app.js:5221 WebSocket connection to 'wss://api.taiga.io/events' failed: WebSocket is closed before the connection is established.
e.stopExistingConnection @ app.js:5221
t @ lodash.js:4949
e.setupConnection @ app.js:5193
t @ lodash.js:4949
e @ raven.js:444
value @ elements.js:1
value @ elements.js:1
value @ elements.js:1
invoke @ elements.js:1
t.args.<computed> @ elements.js:1
setTimeout (async)
l @ elements.js:1
value @ elements.js:1
value @ elements.js:1
value @ elements.js:1
w @ elements.js:1
(anonymous) @ elements.js:1
T.r.<computed> @ elements.js:1
(anonymous) @ raven.js:1201
e.onClose @ app.js:5460
t @ lodash.js:4949
e @ raven.js:444
value @ elements.js:1
value @ elements.js:1
value @ elements.js:1
o @ elements.js:1
v @ elements.js:1
app.js:5221 WebSocket connection to 'wss://api.taiga.io/events' failed: WebSocket is closed before the connection is established.
e.stopExistingConnection @ app.js:5221
t @ lodash.js:4949
e.setupConnection @ app.js:5193
t @ lodash.js:4949
e @ raven.js:444
value @ elements.js:1
value @ elements.js:1
value @ elements.js:1
invoke @ elements.js:1
t.args.<computed> @ elements.js:1
setTimeout (async)
l @ elements.js:1
value @ elements.js:1
value @ elements.js:1
value @ elements.js:1
w @ elements.js:1
(anonymous) @ elements.js:1
T.r.<computed> @ elements.js:1
(anonymous) @ raven.js:1201
e.onClose @ app.js:5460
t @ lodash.js:4949
e @ raven.js:444
value @ elements.js:1
value @ elements.js:1
value @ elements.js:1
o @ elements.js:1
v @ elements.js:1
app.js:5221 WebSocket connection to 'wss://api.taiga.io/events' failed: WebSocket is closed before the connection is established.
e.stopExistingConnection @ app.js:5221
t @ lodash.js:4949
e.setupConnection @ app.js:5193
t @ lodash.js:4949
e @ raven.js:444
value @ elements.js:1
value @ elements.js:1
value @ elements.js:1
invoke @ elements.js:1
t.args.<computed> @ elements.js:1
setTimeout (async)
l @ elements.js:1
value @ elements.js:1
value @ elements.js:1
value @ elements.js:1
w @ elements.js:1
(anonymous) @ elements.js:1
T.r.<computed> @ elements.js:1
(anonymous) @ raven.js:1201
e.onClose @ app.js:5460
t @ lodash.js:4949
e @ raven.js:444
value @ elements.js:1
value @ elements.js:1
value @ elements.js:1
o @ elements.js:1
v @ elements.js:1
app.js:5221 WebSocket connection to 'wss://api.taiga.io/events' failed: WebSocket is closed before the connection is established.
e.stopExistingConnection @ app.js:5221
t @ lodash.js:4949
e.setupConnection @ app.js:5193
t @ lodash.js:4949
e @ raven.js:444
value @ elements.js:1
value @ elements.js:1
value @ elements.js:1
invoke @ elements.js:1
t.args.<computed> @ elements.js:1
setTimeout (async)
l @ elements.js:1
value @ elements.js:1
value @ elements.js:1
value @ elements.js:1
w @ elements.js:1
(anonymous) @ elements.js:1
T.r.<computed> @ elements.js:1
(anonymous) @ raven.js:1201
e.onClose @ app.js:5460
t @ lodash.js:4949
e @ raven.js:444
value @ elements.js:1
value @ elements.js:1
value @ elements.js:1
o @ elements.js:1
v @ elements.js:1
app.js:5221 WebSocket connection to 'wss://api.taiga.io/events' failed: WebSocket is closed before the connection is established.
e.stopExistingConnection @ app.js:5221
t @ lodash.js:4949
e.setupConnection @ app.js:5193
t @ lodash.js:4949
e @ raven.js:444
value @ elements.js:1
value @ elements.js:1
value @ elements.js:1
invoke @ elements.js:1
t.args.<computed> @ elements.js:1
setTimeout (async)
l @ elements.js:1
value @ elements.js:1
value @ elements.js:1
value @ elements.js:1
w @ elements.js:1
(anonymous) @ elements.js:1
T.r.<computed> @ elements.js:1
(anonymous) @ raven.js:1201
e.onClose @ app.js:5460
t @ lodash.js:4949
e @ raven.js:444
value @ elements.js:1
value @ elements.js:1
value @ elements.js:1
o @ elements.js:1
v @ elements.js:1
app.js:5205 WebSocket connection to 'wss://api.taiga.io/events' failed: 
e.setupConnection @ app.js:5205
t @ lodash.js:4949
e @ raven.js:444
value @ elements.js:1
value @ elements.js:1
value @ elements.js:1
invoke @ elements.js:1
t.args.<computed> @ elements.js:1
angular.js:14195 WebSocket error: [object Event]
(anonymous) @ angular.js:14195
e.onError @ app.js:5451
t @ lodash.js:4949
e @ raven.js:444
value @ elements.js:1
value @ elements.js:1
value @ elements.js:1
o @ elements.js:1
v @ elements.js:1
error (async)
a @ elements.js:1
value @ elements.js:1
value @ elements.js:1
value @ elements.js:1
(anonymous) @ elements.js:1
(anonymous) @ raven.js:1270
e.setupConnection @ app.js:5208
t @ lodash.js:4949
e @ raven.js:444
value @ elements.js:1
value @ elements.js:1
value @ elements.js:1
invoke @ elements.js:1
t.args.<computed> @ elements.js:1
setTimeout (async)
l @ elements.js:1
value @ elements.js:1
value @ elements.js:1
value @ elements.js:1
w @ elements.js:1
(anonymous) @ elements.js:1
T.r.<computed> @ elements.js:1
(anonymous) @ raven.js:1201
e.onClose @ app.js:5460
t @ lodash.js:4949
e @ raven.js:444
value @ elements.js:1
value @ elements.js:1
value @ elements.js:1
o @ elements.js:1
v @ elements.js:1
app.js:5205 WebSocket connection to 'wss://api.taiga.io/events' failed: 
e.setupConnection @ app.js:5205
t @ lodash.js:4949
e @ raven.js:444
value @ elements.js:1
value @ elements.js:1
value @ elements.js:1
invoke @ elements.js:1
t.args.<computed> @ elements.js:1
angular.js:14195 WebSocket error: [object Event]
(anonymous) @ angular.js:14195
e.onError @ app.js:5451
t @ lodash.js:4949
e @ raven.js:444
value @ elements.js:1
value @ elements.js:1
value @ elements.js:1
o @ elements.js:1
v @ elements.js:1
error (async)
a @ elements.js:1
value @ elements.js:1
value @ elements.js:1
value @ elements.js:1
(anonymous) @ elements.js:1
(anonymous) @ raven.js:1270
e.setupConnection @ app.js:5208
t @ lodash.js:4949
e @ raven.js:444
value @ elements.js:1
value @ elements.js:1
value @ elements.js:1
invoke @ elements.js:1
t.args.<computed> @ elements.js:1
setTimeout (async)
l @ elements.js:1
value @ elements.js:1
value @ elements.js:1
value @ elements.js:1
w @ elements.js:1
(anonymous) @ elements.js:1
T.r.<computed> @ elements.js:1
(anonymous) @ raven.js:1201
e.onClose @ app.js:5460
t @ lodash.js:4949
e @ raven.js:444
value @ elements.js:1
value @ elements.js:1
value @ elements.js:1
o @ elements.js:1
v @ elements.js:1
app.js:5205 WebSocket connection to 'wss://api.taiga.io/events' failed: 
e.setupConnection @ app.js:5205
t @ lodash.js:4949
e @ raven.js:444
value @ elements.js:1
value @ elements.js:1
value @ elements.js:1
invoke @ elements.js:1
t.args.<computed> @ elements.js:1
angular.js:14195 WebSocket error: [object Event]
(anonymous) @ angular.js:14195
e.onError @ app.js:5451
t @ lodash.js:4949
e @ raven.js:444
value @ elements.js:1
value @ elements.js:1
value @ elements.js:1
o @ elements.js:1
v @ elements.js:1
error (async)
a @ elements.js:1
value @ elements.js:1
value @ elements.js:1
value @ elements.js:1
(anonymous) @ elements.js:1
(anonymous) @ raven.js:1270
e.setupConnection @ app.js:5208
t @ lodash.js:4949
e @ raven.js:444
value @ elements.js:1
value @ elements.js:1
value @ elements.js:1
invoke @ elements.js:1
t.args.<computed> @ elements.js:1
setTimeout (async)
l @ elements.js:1
value @ elements.js:1
value @ elements.js:1
value @ elements.js:1
w @ elements.js:1
(anonymous) @ elements.js:1
T.r.<computed> @ elements.js:1
(anonymous) @ raven.js:1201
e.onClose @ app.js:5460
t @ lodash.js:4949
e @ raven.js:444
value @ elements.js:1
value @ elements.js:1
value @ elements.js:1
o @ elements.js:1
v @ elements.js:1
app.js:5205 WebSocket connection to 'wss://api.taiga.io/events' failed: 
e.setupConnection @ app.js:5205
t @ lodash.js:4949
e @ raven.js:444
value @ elements.js:1
value @ elements.js:1
value @ elements.js:1
invoke @ elements.js:1
t.args.<computed> @ elements.js:1
angular.js:14195 WebSocket error: [object Event]
(anonymous) @ angular.js:14195
e.onError @ app.js:5451
t @ lodash.js:4949
e @ raven.js:444
value @ elements.js:1
value @ elements.js:1
value @ elements.js:1
o @ elements.js:1
v @ elements.js:1
error (async)
a @ elements.js:1
value @ elements.js:1
value @ elements.js:1
value @ elements.js:1
(anonymous) @ elements.js:1
(anonymous) @ raven.js:1270
e.setupConnection @ app.js:5208
t @ lodash.js:4949
e @ raven.js:444
value @ elements.js:1
value @ elements.js:1
value @ elements.js:1
invoke @ elements.js:1
t.args.<computed> @ elements.js:1
setTimeout (async)
l @ elements.js:1
value @ elements.js:1
value @ elements.js:1
value @ elements.js:1
w @ elements.js:1
(anonymous) @ elements.js:1
T.r.<computed> @ elements.js:1
(anonymous) @ raven.js:1201
e.onClose @ app.js:5460
t @ lodash.js:4949
e @ raven.js:444
value @ elements.js:1
value @ elements.js:1
value @ elements.js:1
o @ elements.js:1
v @ elements.js:1
app.js:5205 WebSocket connection to 'wss://api.taiga.io/events' failed: 
e.setupConnection @ app.js:5205
t @ lodash.js:4949
e @ raven.js:444
value @ elements.js:1
value @ elements.js:1
value @ elements.js:1
invoke @ elements.js:1
t.args.<computed> @ elements.js:1
angular.js:14195 WebSocket error: [object Event]
(anonymous) @ angular.js:14195
e.onError @ app.js:5451
t @ lodash.js:4949
e @ raven.js:444
value @ elements.js:1
value @ elements.js:1
value @ elements.js:1
o @ elements.js:1
v @ elements.js:1
error (async)
a @ elements.js:1
value @ elements.js:1
value @ elements.js:1
value @ elements.js:1
(anonymous) @ elements.js:1
(anonymous) @ raven.js:1270
e.setupConnection @ app.js:5208
t @ lodash.js:4949
e @ raven.js:444
value @ elements.js:1
value @ elements.js:1
value @ elements.js:1
invoke @ elements.js:1
t.args.<computed> @ elements.js:1
setTimeout (async)
l @ elements.js:1
value @ elements.js:1
value @ elements.js:1
value @ elements.js:1
w @ elements.js:1
(anonymous) @ elements.js:1
T.r.<computed> @ elements.js:1
(anonymous) @ raven.js:1201
e.onClose @ app.js:5460
t @ lodash.js:4949
e @ raven.js:444
value @ elements.js:1
value @ elements.js:1
value @ elements.js:1
o @ elements.js:1
v @ elements.js:1
app.js:5205 WebSocket connection to 'wss://api.taiga.io/events' failed: 
e.setupConnection @ app.js:5205
t @ lodash.js:4949
e @ raven.js:444
value @ elements.js:1
value @ elements.js:1
value @ elements.js:1
invoke @ elements.js:1
t.args.<computed> @ elements.js:1
angular.js:14195 WebSocket error: [object Event]
(anonymous) @ angular.js:14195
e.onError @ app.js:5451
t @ lodash.js:4949
e @ raven.js:444
value @ elements.js:1
value @ elements.js:1
value @ elements.js:1
o @ elements.js:1
v @ elements.js:1
error (async)
a @ elements.js:1
value @ elements.js:1
value @ elements.js:1
value @ elements.js:1
(anonymous) @ elements.js:1
(anonymous) @ raven.js:1270
e.setupConnection @ app.js:5208
t @ lodash.js:4949
e @ raven.js:444
value @ elements.js:1
value @ elements.js:1
value @ elements.js:1
invoke @ elements.js:1
t.args.<computed> @ elements.js:1
setTimeout (async)
l @ elements.js:1
value @ elements.js:1
value @ elements.js:1
value @ elements.js:1
w @ elements.js:1
(anonymous) @ elements.js:1
T.r.<computed> @ elements.js:1
(anonymous) @ raven.js:1201
e.onClose @ app.js:5460
t @ lodash.js:4949
e @ raven.js:444
value @ elements.js:1
value @ elements.js:1
value @ elements.js:1
o @ elements.js:1
v @ elements.js:1
app.js:5205 WebSocket connection to 'wss://api.taiga.io/events' failed: 
e.setupConnection @ app.js:5205
t @ lodash.js:4949
e @ raven.js:444
value @ elements.js:1
value @ elements.js:1
value @ elements.js:1
invoke @ elements.js:1
t.args.<computed> @ elements.js:1
angular.js:14195 WebSocket error: [object Event]
(anonymous) @ angular.js:14195
e.onError @ app.js:5451
t @ lodash.js:4949
e @ raven.js:444
value @ elements.js:1
value @ elements.js:1
value @ elements.js:1
o @ elements.js:1
v @ elements.js:1
error (async)
a @ elements.js:1
value @ elements.js:1
value @ elements.js:1
value @ elements.js:1
(anonymous) @ elements.js:1
(anonymous) @ raven.js:1270
e.setupConnection @ app.js:5208
t @ lodash.js:4949
e @ raven.js:444
value @ elements.js:1
value @ elements.js:1
value @ elements.js:1
invoke @ elements.js:1
t.args.<computed> @ elements.js:1
setTimeout (async)
l @ elements.js:1
value @ elements.js:1
value @ elements.js:1
value @ elements.js:1
w @ elements.js:1
(anonymous) @ elements.js:1
T.r.<computed> @ elements.js:1
(anonymous) @ raven.js:1201
e.onClose @ app.js:5460
t @ lodash.js:4949
e @ raven.js:444
value @ elements.js:1
value @ elements.js:1
value @ elements.js:1
o @ elements.js:1
v @ elements.js:1
app.js:5205 WebSocket connection to 'wss://api.taiga.io/events' failed: 
e.setupConnection @ app.js:5205
t @ lodash.js:4949
e @ raven.js:444
value @ elements.js:1
value @ elements.js:1
value @ elements.js:1
invoke @ elements.js:1
t.args.<computed> @ elements.js:1
angular.js:14195 WebSocket error: [object Event]
(anonymous) @ angular.js:14195
e.onError @ app.js:5451
t @ lodash.js:4949
e @ raven.js:444
value @ elements.js:1
value @ elements.js:1
value @ elements.js:1
o @ elements.js:1
v @ elements.js:1
error (async)
a @ elements.js:1
value @ elements.js:1
value @ elements.js:1
value @ elements.js:1
(anonymous) @ elements.js:1
(anonymous) @ raven.js:1270
e.setupConnection @ app.js:5208
t @ lodash.js:4949
e @ raven.js:444
value @ elements.js:1
value @ elements.js:1
value @ elements.js:1
invoke @ elements.js:1
t.args.<computed> @ elements.js:1
setTimeout (async)
l @ elements.js:1
value @ elements.js:1
value @ elements.js:1
value @ elements.js:1
w @ elements.js:1
(anonymous) @ elements.js:1
T.r.<computed> @ elements.js:1
(anonymous) @ raven.js:1201
e.onClose @ app.js:5460
t @ lodash.js:4949
e @ raven.js:444
value @ elements.js:1
value @ elements.js:1
value @ elements.js:1
o @ elements.js:1
v @ elements.js:1
app.js:5205 WebSocket connection to 'wss://api.taiga.io/events' failed: 
e.setupConnection @ app.js:5205
t @ lodash.js:4949
e @ raven.js:444
value @ elements.js:1
value @ elements.js:1
value @ elements.js:1
invoke @ elements.js:1
t.args.<computed> @ elements.js:1
angular.js:14195 WebSocket error: [object Event]
(anonymous) @ angular.js:14195
e.onError @ app.js:5451
t @ lodash.js:4949
e @ raven.js:444
value @ elements.js:1
value @ elements.js:1
value @ elements.js:1
o @ elements.js:1
v @ elements.js:1
error (async)
a @ elements.js:1
value @ elements.js:1
value @ elements.js:1
value @ elements.js:1
(anonymous) @ elements.js:1
(anonymous) @ raven.js:1270
e.setupConnection @ app.js:5208
t @ lodash.js:4949
e @ raven.js:444
value @ elements.js:1
value @ elements.js:1
value @ elements.js:1
invoke @ elements.js:1
t.args.<computed> @ elements.js:1
setTimeout (async)
l @ elements.js:1
value @ elements.js:1
value @ elements.js:1
value @ elements.js:1
w @ elements.js:1
(anonymous) @ elements.js:1
T.r.<computed> @ elements.js:1
(anonymous) @ raven.js:1201
e.onClose @ app.js:5460
t @ lodash.js:4949
e @ raven.js:444
value @ elements.js:1
value @ elements.js:1
value @ elements.js:1
o @ elements.js:1
v @ elements.js:1
app.js:5205 WebSocket connection to 'wss://api.taiga.io/events' failed: 
e.setupConnection @ app.js:5205
t @ lodash.js:4949
e @ raven.js:444
value @ elements.js:1
value @ elements.js:1
value @ elements.js:1
invoke @ elements.js:1
t.args.<computed> @ elements.js:1
angular.js:14195 WebSocket error: [object Event]```

[Xaviju]

Ok so, based on your feedback, it looks like an error caused by taiga-events when a tab is open for a long time.
Thanks a lot, I'll update the issue on Taiga, so the team can check it.