Hey, this is due to the new UCP platform, as all new wikis will be under that platform. (existing wikis will be migrated later)
It's not in good shape at the moment, as lots of features aren't there yet and there are many bugs, but they're releasing weekly updates on it, and eventually it'll all be fixed up and good as new. Just have to wait for that.
Sorry for leaving you a message here, but I sent a request and it was assigned to you and I hope you can reply soon as my problem is very urgent and I might lose my position in a wiki forever! I don’t want to lose it forever.