I tried to import a space from a backup and it failed because the hdd ran out of space. I then deleted the half imported spaced and did it again. This time it worked.
But since then all icons in Confluence are missing. Absolutely everything. Images which I inserted in pages load fine, but everything standard icon does not load.
Here is a screenshot:
https://www.dropbox.com/s/3xowt2amwg0iaox/confluence_missing_icons.png?dl=0
Tried this guide, but it didn't help.
https://confluence.atlassian.com/confkb/profile-picture-on-the-top-right-corner-is-missing-402030818.html
In the browser's developer console I see several errors:
Failed to load resource: the server responded with a status of 404 (Not Found) default-space-logo-256.png
Failed to load resource: the server responded with a status of 500 (Internal Server Error) add_profile_pic.png
Failed to load resource: the server responded with a status of 404 (Not Found) default.png
So basically 404 and 500 related to default images.