First, have you properly connected a forum to the default wiki namespace?
If not, first create your forum with the settings in the
VaultWiki of the Forum Manager set to disabled for the setting:
Enable wiki in this forum?
Then go to your AdminCP > VaultWiki > Namespace Manager and pick the Wiki Namespace to Edit. In that screen you have the option to set
Top-Level Forum. This needs to be adjusted to reflect the forum you want to use for your main wiki articles.
Save that, and double check that VaultWiki has now linked the forum and the namespace together by checking the forum again in the Forum Manager, where the option
Enable wiki in this forum? should now read
Wiki.
If you've done this, have you enabled new posts within the forums you are using for your default namespaces? The option
Forum is Open needs to be set to
Yes.
If that is set, check the permissions your usergroup has to create threads/new articles within that forum (This is the Forum Permissions page). This is in the setting
Can Post Threads under a usergroups permission for the forum.
Hope this helps in some way.
