GM is the quest bug in "Attending Class" in Tradin

Hi, Im new here at forums and i want to tell this quest bug in Trading Hole the Brawler Agent, QiGong Agent, and Swordsman Agent, i think there's bug or something can't worked.

I hardly need your reply ASAP plz can you tell me whats wrong, it always says "Common Error" i don't know what to do, oh and one thing there's quest bug in Master Zeng in Brawler Type, i see on the other post about that the quest bug on Master Zeng i just want to make what type monster to kill.

Thank you,