RuntimeException: image not found: image:app-dark.svg webroot

I'm using user_odic and after some recent updates (not sure whether Nextcloud server or this app triggered this, both were updated at similar times) I can now no longer access the settings page for most of my users. Strangely this does not affect all users, but most. I suspect the difference is what users had a theme preference set or have other seemingly unrelated settings...

Server: 24.0.6
User OIDC: 1.2.0

  Error    index              RuntimeException: image not found: image:app-dark.svg webroot:                          2022-10-14T16:50:31+00:00
                              serverroot:/usr/share/webapps/nextcloud at lib/private/URLGenerator.php line 244

                               0. apps/user_oidc/lib/Settings/Section.php line 73
                                  OC\URLGenerator->imagePath(

                                  )
                               1. .../CommonSettingsTrait.php line 90
                                  OCA\UserOIDC\Settings\Section->getIcon(

                                  )
                               2. .../CommonSettingsTrait.php line 115
                                  OCA\Settings\Controller\PersonalSettingsController->formatSections(

                                  )
                               3. .../CommonSettingsTrait.php line 67
                                  OCA\Settings\Controller\PersonalSettingsController->formatAdminSections(

                                  )
                               4. .../CommonSettingsTrait.php line 139
                                  OCA\Settings\Controller\PersonalSettingsController->getNavigationParameters(

                                  )
                               5. .../PersonalSettingsController.php line 64
                                  OCA\Settings\Controller\PersonalSettingsController->getIndexResponse(

                                  )
                               6. .../Dispatcher.php line 225
                                  OCA\Settings\Controller\PersonalSettingsController->index(

                                  )
                               7. .../Dispatcher.php line 133
                                  OC\AppFramework\Http\Dispatcher->executeController(

                                  )
                               8. .../AppFramework/App.php line 172
                                  OC\AppFramework\Http\Dispatcher->dispatch(

                                  )
                               9. lib/private/Route/Router.php line 298
                                  OC\AppFramework\App::main(

                                  )
                              10. lib/base.php line 1030
                                  OC\Route\Router->match(

                                  )
                              11. index.php line 36
                                  OC::handleRequest(

                                  )
  Error    index              RuntimeException: image not found: image:app-dark.svg webroot:                          2022-10-14T16:50:31+00:00
                              serverroot:/usr/share/webapps/nextcloud at lib/private/URLGenerator.php line 244

                               0. apps/user_oidc/lib/Settings/Section.php line 73
                                  OC\URLGenerator->imagePath(

                                  )
                               1. .../CommonSettingsTrait.php line 90
                                  OCA\UserOIDC\Settings\Section->getIcon(

                                  )
                               2. .../CommonSettingsTrait.php line 115
                                  OCA\Settings\Controller\PersonalSettingsController->formatSections(

                                  )
                               3. .../CommonSettingsTrait.php line 67
                                  OCA\Settings\Controller\PersonalSettingsController->formatAdminSections(

                                  )
                               4. .../CommonSettingsTrait.php line 139
                                  OCA\Settings\Controller\PersonalSettingsController->getNavigationParameters(

                                  )
                               5. .../PersonalSettingsController.php line 64
                                  OCA\Settings\Controller\PersonalSettingsController->getIndexResponse(

                                  )
                               6. .../Dispatcher.php line 225
                                  OCA\Settings\Controller\PersonalSettingsController->index(

                                  )
                               7. .../Dispatcher.php line 133
                                  OC\AppFramework\Http\Dispatcher->executeController(

                                  )
                               8. .../AppFramework/App.php line 172
                                  OC\AppFramework\Http\Dispatcher->dispatch(

                                  )
                               9. lib/private/Route/Router.php line 298
                                  OC\AppFramework\App::main(

                                  )
                              10. lib/base.php line 1030
                                  OC\Route\Router->match(

                                  )
                              11. index.php line 36
                                  OC::handleRequest(

                                  )

Messing with the code in lib/private/URLGenerator.php I was able to isolate the issue to know that the only thrown when $appName is user_oidc. I also determined that if I change line 239 like so:

-		if ($path !== '') {
+		if ($path !== '' || true) {

Not only is the error not thrown but next cloud can now load the settings page for all users.

Start with apps/user_oidc/lib/Settings/Section.php at line 73 and trace the imagePath call into lib/private/URLGenerator.php around line 244. Check why the user_oidc settings icon resolves to app-dark.svg and verify the settings page loads for affected users without the RuntimeException.