Fatal error…line 798 at bottom of FAQ Manager

I have installed a fresh copy of WP3.3, added backupbuddy, WPMU DEV Videos, WPMU DEV Update Notifications and then MU Support System.

The FAQ manager will not display the editor and at the bottom it says…

Warning: require_once(/home/tigerweb/public_html/wp-admin/includes/internal-linking.php) [function.require-once]: failed to open stream: No such file or directory in /home/tigerweb/public_html/wp-content/plugins/incsub-support/incsub-support.php on line 798

Fatal error: require_once() [function.require]: Failed opening required '/home/tigerweb/public_html/wp-admin/includes/internal-linking.php' (include_path='.:disappointed:usr/lib/php:disappointed:usr/local/lib/php':wink: in /home/tigerweb/public_html/wp-content/plugins/incsub-support/incsub-support.php on line 798

Please Help!