im not sure what's going on, but I have verified that this is not a local issue by using a few external dns lookup tools, cohost.org is not a valid domain anymore
I ended up using https://osint.sh/dnshistory/ to get the last known ip address for cohost (just remember to scroll to the bottom, since it's ordered from oldest to newest) and then edited my hosts file to point cohost.org to that ip
If you are still browsing cohost fine right now, then either this issue has already been fixed or your device still has the domain cached and if it's the latter you might want to take note of the steps I took above
Update: there is now a bug report
2nd update: It appears to have been fixed! (around 35 mins after I made this post, which is surprisingly quick tbh)