This issue is usually caused by usage of VPN But if you do not have 1, please submit a Ban Appeal so that GMs may verify your account https://royals.ms/forum/forums/ban-appeal.8/
I am having the same issue. haven't logged in a while, and I moved as well. So I can't really know what is going on with the Internet at my new place. But pretty much is I am logging into my account, selecting the character, entering the PIC code, and then the game crashes and I see this window. EDIT: After searching for a solution in the forum, I have found someone said something about NordVPN still running in the background even if the app is not up and running. So I checked and I saw a process running and I stopped it. It fixed the issue for me.
