Thread:Old McDonald/@comment-3173617-20150917185122/@comment-24494906-20150917185510

You're trying to add an email address because you're seeing a banner that you should add one, right?

Someone else was having trouble changing the mail address, too: http://community.wikia.com/wiki/User_blog_comment:DaNASCAT/Technical_Update:_September_16,_2015/@comment-I.eat.Goopys.carbonara-20150917154245?permalink=912506#comm-912506

Maybe this problem has something to do with logins using Facebook accounts. If you can't get it to work, just contact Wikia staff directly via Special:Contact.