[HELP] Quest Bug

I have a problem i quest "mentor (inisis) darkon" then my character suddenly cannot log my neuz is crash then i debug it and this is the error some one can help me out here please??

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lpCharacter is not valid. Have a look which npc is requested and fix it.

If i remove the quest isn't possible to fix the character and able to login?

its in NPC in Darkon [Mentor] Inisis and i don't know what is the error in pro quest there is no inisis npc etc and i don't know how to fix this or how to enable character to login in world server again.