[2021] Started encountering errors when trying to join servers with a round in progress

Thanks Greb for spreading the word! I wanted to give an additional poke here to say the patch is now live, see the announcement and changelog here: https://store.steampowered.com/news/app/602960/view/2942526618673855908

I hope this helps with the issues you've been having. If not, please post about any and all problems of this kind on the Help & Technical Support forums with as much detail as possible, such as exact error messages or crash reports, and I'll be sure to forward it to the rest of our team!