Board Thread:Support Requests - Getting Technical/@comment-26854335-20151222200215/@comment-1757994-20151223141529

Just to recap: you're saying that you are unable to edit your mainspace pages since you added MediaWiki:Common.js.

Your mainspace pages appear editable to me, in both Monobook and Oasis. I didn't save anything, but I was able to edit a few that I tried.

If you're suddenly unable to edit, I'd say try Special:Contact.