Thorin I had this problem taken up on the forum some days ago but I managed to get past it... it's simple you just have to hurry talking to Lonk before Irenicus comes out of the teleport thing... bribe him with 2000 and you will be teleported to the room were you meet the imprisoned wizzies without Irenicus interference
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I'm a protector of good
a seeker of truth
a symbol of light