@all, sorry for the delayed update - I’ve been waiting on news to share.
This Server Error issue remains a top priority for us for Vermintide 2.
Our Backend Developers have been able to dig into this, and we’ve identified that the issue isn’t something we can fix solely on our end, and that it runs further up the chain with our Backend Service Provider. We’ve reached out to them and will be working with them to hopefully resolve this as soon as possible.
I can completely understand frustrations as this is taking some time to resolve - we genuinely share the same frustrations 
Please bear with us whilst we get to the bottom of this - thank you for your continued patience.