Board Thread:Support Requests - Getting Started/@comment-3171140-20140511011806/@comment-856287-20140511023630

hmm... It seems others have had similar issues (in the sometimes distant past), and the solution seems to be either, "Change browsers," "Wait a while and it wil fix itself," or "Have Wikia staff make it for you and set you as the founder." 😆

I can't create a wiki, Can't create new Wikia, Can't make a Wiki, Can't Create a Wiki.

Personally, I think you'll be okay disabling Avast while you're only on Wikia creating the new wiki, and then you can turn it right back on. But, if you don't want to risk it that's totally up to you. I'd Special:Contact just the same. It may not be Avast causing it at all.