Cannot save Groups Activity Privacy settings

Attempting to save the Groups Activity Privacy settings results in the following error:

Fatal error: Call to undefined function bp_activity_do_mentions() in /wp-content/plugins/buddypress-activity-privacy/includes/bp-activity-privacy-admin.php on line 211

Also after posting an image to a newly created album on a group page I get the following error whenever I view the group page:

Fatal error: Call to undefined function bp_activity_get_specific() in /wp-content/plugins/buddypress-activity-privacy/includes/bp-activity-privacy-integrations.php on line 339

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