Unable to approve or report flip - Report (NaN left)

[rioda-org]

One user had sent a video of a problem community members experienced few times up untill now

video_2022-08-01_15-04-51.mp4

[rioda-org]

Same for user in desktop app
https://discord.com/channels/634481767352369162/634481933803585546/1002938641783455784

2022-07-30_15-38-08.mp4

[mnz2000]

I had this same problem in last validation. First I was able to successfully mark the flips. I approved some, reported some, skipped some. About half-way through, the whole user-interface disappeared and the web-app contents went all white.

I checked my node (running on a VPS), and it had the kswapd0 process taking most CPU time. I assumed the node had stopped answering the web-app. Indeed, after a while my web-app came back on, with the "Synchronizing..." message.

Once synchronized, I was able to continue the long session, except with the same symptoms as OP, Approve/Report buttons didn't work, and Report said ("NaN left"). I was able to submit the results with the approved/reported flips that I had done before the sync.

I'm guessing the OP may have had a shorter sync problem right in the beginning of the long session. Hope this helps to debug the issue.

[hlolve]

I had this same problem in last validation. First I was able to successfully mark the flips. I approved some, reported some, skipped some. About half-way through, the whole user-interface disappeared and the web-app contents went all white.

I checked my node (running on a VPS), and it had the kswapd0 process taking most CPU time. I assumed the node had stopped answering the web-app. Indeed, after a while my web-app came back on, with the "Synchronizing..." message.

Once synchronized, I was able to continue the long session, except with the same symptoms as OP, Approve/Report buttons didn't work, and Report said ("NaN left"). I was able to submit the results with the approved/reported flips that I had done before the sync.

I'm guessing the OP may have had a shorter sync problem right in the beginning of the long session. Hope this helps to debug the issue.

I think your VPS was low on RAM and started to use SWAP, and that can make to fail validation. What are your VPS specifications ? vCPU, RAM, Storage size and type ?

[mnz2000]

Yes, obviously my VPS was low on RAM. My point was not to debug my VPS but to provide a way to reproduce the problem in the web-app.

[pocoloko]

I had this happen in a related but not exactly the same way... I accidentally closed the tab in Firefox during 2nd part of long session of validation. Then I did a "reopen closed tab" and the tab returned but asked me to login, after logging in I could see all the flips and my previous selections from 1st part of long, but I cannot select approve/report and the reports show NaN, I can only go to last flip in list and submit blank answers