Script d1_take_item, OID: 80004dfb, Tag: CanalKrovus, ERROR: TOO MANY INSTRUCTIONS
That's the error message you get when you try and give him Beetle Bellies. He takes one, gives you 5gp and thats it. You don't get any XP.
It is easy to duplicate. Just kill a beetle from the farm and try and give it to Krovus.