When login into wikitech I experienced an error page stating:
[fb6658b5ae6822f4b2fb70fc] /w/index.php?title=Special:UserLogin&returnto=User:Elukey/Analytics/Hadoop+testing+cluster UnderflowException from line 446 of /srv/mediawiki/w/extensions/ConfirmEdit/FancyCaptcha/includes/FancyCaptcha.php: Ran out of captcha images
Moving from the error page, I was successfully logged in.
This seems linked to T230245
Thanks ops-team for the feedback and procedure when ping on irc.