Attempting to /friend or /unfriend a username that was once used by a player on MCO (such as /friend cindyslee) will cause an error message to appear in chat. Error message is as follows: Traceback (most recent call last): File "/home/minecraft/scripts/exec/exec_friend.py", line 72, in <module> {"text":" (","color":sign_colour}, NameError: name 'sign_colour' is not defined