Plesk not displayed correctly 12.0.18 Update #70

[Alex3001]

Hi,

I am running a Virtual Server with Ubuntu 14.04.3 LTS and recently upgraded my Plesk to version 12.0.18 #70 via VZPP (which, I think, uses apt-get?). Unfortunately, I don't really know the previous version (some 12.0.x #y).

Plesk itself seems still running fine, but the CSS is broken. See the attached screenshot. Directly after the upgrade, three files where not found (404) (also see screenshot):
- common.css
- main-buttons.css
- responsive.css

How can I fix this?

 

[Alex3001]

/Edit: Sorry, after some more browsing throw the forum, I found what Google didn't: Someone here found a way to solve this issue: https://talk.plesk.com/threads/gui-broken-since-last-update-12-0-18-70.335552/