Fatal Error with BuddyPress Notifications

Enbaling the notfication integration causes fatal error on new posts.

BuddyPress 4.4.0
WPForo 1.6.2

An error of type E_ERROR was caused in line 591 of the file /home/wp-content/plugins/wpforo/wpf-includes/integration/buddypress.php. Error message: Uncaught Error: Call to undefined function bp_notifications_add_notification() in /home/wp-content/plugins/wpforo/wpf-includes/integration/buddypress.php:591
Stack trace:
#0 /home/wp-content/plugins/wpforo/wpf-includes/integration/buddypress.php(667): wpforo_bp_add_notification(Array, Array)
#1 /home/wp-includes/class-wp-hook.php(286): wpforo_bp_notification_on_post_status_change('12', 0)
#2 /home/wp-includes/class-wp-hook.php(310): WP_Hook->apply_filters(NULL, Array)
#3 /home/wp-includes/plugin.php(465): WP_Hook->do_action(Array)
#4 /home/wp-content/plugins/wpforo/wpf-includes/class-posts.php(1359): do_action('wpforo_post_sta...', '12', 0)
#5 /home/wp-content/plugins/wpforo/wpf-includes/class-moderation.php(74): wpForoPost->status('12', 0)
#6 /home/wp-content/plugins/wpforo/wpf-in