Author: it_is_me_here
Description:
Go to https://en.wikipedia.org/wiki/Special:Version and click on the link that's the WM software version number in brackets - currently "(c29337d)". For me, at least, it leads to a gerrit.wikimedia.org page which just contains "400 - Unknown action". Presumably it's not meant to do that.
Version: 1.20.x
Severity: normal