This is the same error the wiki gets when you try to edit (or even preview an edit) on certain pages (eg.
https://wiki.project1999.com/index.p...&action=submit).
I can't say for sure, but most likely it's a temporary issue based on some back-end work Rogean is doing on the servers (I think this site and the wiki used to share a server; not sure if that's still true). You'll likely just have to wait until it's fixed.