add_action(
   'friends_retrieve_friends_error',
    function(
        $user_feed,
        $error,
        $friend_user
    ) {
        // Your code here.
    },
    10,
    3
);

do_action( 'friends_retrieve_friends_error', $user_feed, $error, $friend_user )

do_action( 'friends_retrieve_friends_error', $user_feed, $items, $friend_user )