Strange GUI image issues in NC17 (17.0.3)

When logging into the admin interface or admin section of the interface, I’m seeing some weird stuff on some instances, but not on others. I cannot quite put my finger on why one works and others don’t.

App previews don’t show up (displays as “broken image” in the browser). But if I do a “Show image info” in the browser (right-click menu), it shows the image preview. The only thing that looks weird there is that the MIME type is application/octet-stream.

Furthermore, in some sections of the admin interface, link icons aren’t showing up (also shown as broken images). The URLs are root_url/apps/tasks/img/tasks.svg for example.

I can’t find a pattern as to when it works and when it doesn’t, but obviously, something’s not right :slight_smile:

Hmm … could this have to do with hardening security and cross-origin issues? I see the screenshots are served from URLs like: https://usercontent.apps.nextcloud.com/

(why aren’t they downloaded to the local NC instance first and then served from there?)