12
Ok here is the easy way to fix this bug,
Copy the groupaccess from wfsection includes to xoops_root/includes.
Look throu all the files for:
include XOOPS_ROOT_PATH . '/modules/' . $xoopsModule->dirname() . '/include/groupaccess.php';
and change it to
include XOOPS_ROOT_PATH . '/include/groupaccess.php';
This should fix your problem.