Depends when you downloaded the ZIP. This is a duplicate of an issue that was applied to build 2 (build notification is something we are fixing in VaultWiki 4).
Check your Members tab, and check the download to see if you last downloaded build 1 or 2. If needed, download build 2 (only downloading changes since build 1 should be okay).
If you still experience this issue after patching your installation, please petition this issue.