Board Thread:Support Requests - Getting Technical/@comment-27016726-20150926193719/@comment-5175866-20150926200335

Can you be more specific? Currently wikicreation works, if it doesn't you may send this as a bug report to staff. I can assure you that this is a hallmark for Wikia and their money making and so is something they will want to fix.

If you mean creating custom MediaWiki installations, I do not think wikia will be providing that type of hosting anytime soon. If you want control of the backend then you can use a payed hosting provider.