AIO Problem.Help Please

[JohnLoL]

My All in one Shop got some problem.
i Click Warrior. then i Click hat. the npc reply me " It working ".
How to fix the problem??

i need a teacher to teach me. D:

 

[Synica]

Can you be more specific?
Does it say This NPC is not working properly please report it?
Or says "It working"
Show me the java code also.