In the single i can trade with npc(Jack-O-Man, workshopers and more), but where i connect my client to the Caudron, event(interact) was trigged, but Gui isnt not opening. Right now i dont know, how i can fix this bug, but im still working about this.

fixed

Was wondering if you have figured this bug out yet? Currently running a server with v6.0 and am having the same problem.