Make sure the code is correct — Mob Codes are 9 digits long.
You cannot recruit a player who is already in your Mob.
You also can't recruit more players if you’ve hit your Mob limit, which is based on your level.
Try restarting the app or refreshing your network if it’s not working.
Pro Tip: Share your Mob Code on the Shoutbox or with friends to build your Mob faster!