Board Thread:Support Requests - Designing Your Wikia/@comment-24587604-20140515161803/@comment-856287-20140515163500

Do you have an Avast! extension installed on your browser? That was causing the same problem for someone the other day. If so, just disable the extension, create the wiki, then re-eneable it.

If you don't have Avast! specifically, try toggling other security / adblocking / disconnect / do-not-track extensions off as well. Once the wiki is created, turn them back on.