Coop in Ruins of Welryn(Ruined Era) makes the 2nd person that joins in get disconnected from the server

We were doing coop fine , but as soon as we portaled to Ruins of Welryn, the 2nd player to join the area would get disconnected from the server and have to relog to his character (2 man coop)

We tried both ways, me inviting him and him joining second, me joining second. Same result, 2nd person would get disconnecte*

My log:
Player.log (346.9 KB)

His log
Player.log (379.8 KB)