Can't log in into a character, 2014, 3001, 4001

Issue Description (Required):

I’m playing this game for more than 200 hours, but since a couple of days ago I cannot log in as any character, constantly getting errors 2014, 3001 or 4001.

Because of this errors I’m missing out on 500 Aquilas.

Attempted Solutions (Optional):

I tried reinstalling the game, deleting mods, deleting App folder, everything from “How to Resolve Connectivity Errors & Latency Issues”, except for port forwarding and UPnP. But it shouldn’t be the case, since everything was working perfectly fine.

Platform (Required):

PC - Steam