Getting this error when install
 

Fatal error: Call to a member function query_first() on a non-object in /home/thcpub/public_html/wp-content/plugins/vbbridge/vbbridge.php on line 755

Also locks me out of signing in on wp only. Tried Admin and other user roles

I have my vbulletin in /forum, I no it should be directly in the root but it shuts down my wp site. When it's it active And vb is in /forum some of the features work but does not allow me to log out of admin. it's also not sharing users. Anyone look for some side work $?