Board Thread:Support Requests - Getting Technical/@comment-34665825-20180511222237/@comment-168424-20180518003711

Only Fandom staff could find out what would definitely trigger the infobox builder... I kind of hate it, so I'm glad when it doesn't show up.

As for global CSS or JS, just click w:Special:MyPage/global.css or w:Special:MyPage/global.js. For personal CSS or JS you would go to one of the following pages on any wiki:
 * Special:MyPage/common.css or Special:MyPage/common.js
 * Special:MyPage/wikia.css or Special:MyPage/wikia.js

As I was thinking about this, I realized JS upstream of the infobox builder could screw it up too. If you try it on different wikis and the problem only happens on some it could be upstream CSS or JS.