Yeah, the game's main strength is the Coop, pitty it too has many problems.
Coop can keep an average game alive for years, well if it is working properly.
I am going to try again, maybe droping all my gear before I place it, thinking there could be some conflict, if not I am not sure what could cause this.
If others are not expencing this then, must be something I broke just not sure what.
Edited
Ok it was resolved, didnt have to drop anything .
I noticed that I seemed to have placed the Relic on a differnt pedestal that I did orginally.
Maybe the bug was that somehow I was allowed to place the Robes in the incorrect spot and the end level is triggered by placing in this spot normally only the last relic.