Hi there!

In the first part of the quest, when you talk to an NPC in The Coliseum, he asks you to go and talk with another NPC named "Adalbert".
Well, the NPC's name that is marked with the "!", and that let you continue with the quest, is not "Adalbert". Is "Cotter".

Still, the quest can be done, and in the journal appears that "Adalbert" gave you the info.

Is not a big deal, but it must be deal with. =)

Regards!