Question: How to trigger "Meet with Glendan" in Town "Dorgred".

Question: How to trigger "Meet with Glendan" in Town "Dorgred".
I am not allowed to enter, during the conversation I was told that I need to have some kind of prove.
The quest mark has not changed, to I travelled to other villades if I am lucky and someone else will help me with the necessary prove...
No idea how to continue, maybe someone can help me.

By the way:
One of the things I already dont like that much at the game currently, is that on some quests the trigger are not very intuitive, its more like run around in area, maybe you find something lightning....

It's bugged and have to wait for a patch to fix it.