Fix error message on untrusted domain error page

[MorrisJobke]

Fixes #5347

Before the theming app theme was loaded on that error page but all assets were not loaded because of the trusted domain error. So this changes the theme to the default one if the domain is untrusted.

[rullzer]

fine by me

[bertalanimre]

So how can I fix this on NextCloud 12? Just installed it with the latest downloadable package.

[dyabolik004]

i have Nextcloud 12.0.4 and in lib/private/Server.php there is already the fix but it continue to show up in the log file!

[veelo]

Can confirm that "theming.Theming.getLogo" errors are still in the log. Also, I notice that the e-mail sent out to welcome a new user has a missing logo. Different issue?

Symfony\Component\Routing\Exception\RouteNotFoundException: Unable to generate a URL for the named route "theming.Theming.getLogo" as such route does not exist.
/var/www/nextcloud/lib/private/Route/Router.php - line 339: Symfony\Component\Routing\Generator\UrlGenerator->generate('theming.Theming...', Array, 1)
/var/www/nextcloud/lib/private/Route/CachingRouter.php - line 60: OC\Route\Router->generate('theming.Theming...', Array, false)
/var/www/nextcloud/lib/private/URLGenerator.php - line 77: OC\Route\CachingRouter->generate('theming.Theming...', Array)
/var/www/nextcloud/apps/theming/lib/ThemingDefaults.php - line 165: OC\URLGenerator->linkToRoute('theming.Theming...')
/var/www/nextcloud/lib/public/Defaults.php - line 186: OCA\Theming\ThemingDefaults->getLogo(true)
/var/www/nextcloud/core/templates/layout.guest.php - line 45: OCP\Defaults->getLogo()
/var/www/nextcloud/lib/private/Template/Base.php - line 176: include('/var/www/nextcl...')
/var/www/nextcloud/lib/private/Template/Base.php - line 151: OC\Template\Base->load('/var/www/nextcl...', NULL)
/var/www/nextcloud/lib/private/legacy/template.php - line 202: OC\Template\Base->fetchPage(NULL)
/var/www/nextcloud/lib/private/legacy/template.php - line 224: OC_Template->fetchPage()
/var/www/nextcloud/lib/private/Template/Base.php - line 132: OC_Template->fetchPage()
/var/www/nextcloud/core/templates/403.php - line 7: OC\Template\Base->printPage(){main}

[MorrisJobke]

Yes - please open new tickets for those errors.

[veelo]

I will have to investigate further how to reproduce the exceptions. The missing logo in the e-mail is not a bug, it's due to Micosoft Mail being unale to render SVG :-/