Example
This is monobook (logged in) on Chromium but it's the same with Vector (logged out).
Version: master
Severity: major
URL: https://www.wikidata.org/w/index.php?title=Wikidata:Project_chat&oldid=7502394#Search_error
See Also:
https://bugzilla.wikimedia.org/show_bug.cgi?id=49679
https://bugzilla.wikimedia.org/show_bug.cgi?id=50690
Attached: