Upgrade-In-Progress-Seite hat kein stylesheet
Schaut so aus: 
Firefox-Konsole sagt:
The stylesheet https://eva.fsi.cs.fau.de/static//style.css was not loaded because its MIME type, "application/xhtml+xml", is not "text/css".
To upload designs, you'll need to enable LFS and have an admin enable hashed storage. More information