I have the same problem since the new patches. I even deinstalled and reinstalled the whole game. During the day, it mostly worked except for 1-2 disconnects with the same error.
But now in the evening hours (evening in europe) I get CONSTANT kicks with the error - no matter which character I use to log in. Shiva and Twintania, both servers kick my characters almost immediately after logging in.
It's getting really frustrating tbh..