[4b6] Disable SEF Plugin breaks default template logo url

[PhilETaylor]

Steps to reproduce the issue

Joomla 4 beta 6 - install the "Testing Sample Data"
Visit frontend, click a menu link in the left menu to get to an article
Note that the CASSIOPEIA logo (white text on blue background) is present

In Joomla Admin disable the "System - SEF" plugin

Refresh your article page on the frontend

Note the logo is now a broken image

Expected result

Regardless of SEF settings expectation is to see the logo

Image logo url is http://127.0.0.1:4444/templates/cassiopeia/images/logo.svg

Actual result

Note that joomal4b6 shown in this screenshot is my "Site name" in Joomla Global Config and is not related to the SEF issue.

Image logo URL is http://127.0.0.1:4444/index.php/templates/cassiopeia/images/logo.svg

System information (as much as possible)

Additional comments

[brianteeman]

Unable to replicate

[brianteeman]

Correction - it breaks as soon as I go away from the home page

[bembelimen]

The problem is, that the SEF-Plugin is (beside its little SEF changes) more a "fix all the broken things"-plugin. Like all the broken paths because Joomla! <= 3 has a wrong base tag which is removed in Joomla! 4.
So probably we should make this plugin a locked plugin to prevent disabling it (or re-add the base tag again, but in a correct way).

[Hackwar]

There is no correct way to add the base tag. It does not belong into our output.

[ReLater]

So probably we should make this plugin a locked plugin to prevent disabling it

The ability to disable almost everything in Joomla 4 has been given so that developers can establish their own solutions wherever they want. A big step forward. If we now start to disable the disabling possibility for every extension where something could possibly work wrong, that would be a bad solution. One can not uninstall these extensions anymore in Joomla 4. That should be sufficient.

See also #28563 (comment)
below headline "This is a list of extensions that can be disabled"

[ReLater]

The image should load regardless of the state of the SEF plugin.

If you disable Joomla's link corrections for image paths? From my point of view that's the well known behavior.