tried now a week to play online. I get disconnections all 1-5 mins when i can login. But this is super rare to see a ingame interface :D.
What i tried:
New Install
Steam Repair
New Online Char
VPN (worked fine but only with Premium Services)
TCP Optimizer
nothing helped
Now i tried to find my Player-prev.log or Player.log and searched the “invalid” text.
I would have guessed Germany as for some reason that country seems to have a lot of problems like this, but I don’t know the specifics of why. If the VPN works I’d just use it.