Please see the pinned post: About the Vermintide 2 - Bugs Category to see what information to include in your report.
IS there a fix for the ‘Server Error Sign-in timeout’ issue? I’ve reset the router, restarted the computer, checked the integrity of game files, made firewall rules, switched the firewall off. What is the issue?
Sorry for the late reply! That’s very unfortunate. Are you able to hook your PC up to a mobile hotspot, only for a couple of minutes, purely to see if the error continues? I appreciate this isn’t always an option but it can help isolate the issue.