New forums cannot be created while VaultWiki active
Errors and blank pages result
I was creating my Namespaces in vBulletin 3.8.4 PL2 and VaultWiki 3.0.0 RC1, and when I had the Namespace Manager "Create a new forum", after entering the details, a got a blank response from the Admin CP. Then when trying to access my main forum page, I got a blank white page. Disabling VaultWiki corrected this.
As it turned out, I am unable to edit/create forums while VaultWiki is active. I have to first disable VaultWiki before I create/edit any forums, or the whole system stalls out and I get a white/blank page.