Diablo III: Reaper of Souls

A friend is having an issue, it says "The game connection has been lost: your client has been disconnected from the server" when joining/starting a game. It started with Patch 2.2 and we can't figure how to fix it, we tried restarting router, resetting DNS, restarting PC and switching from Wifi to cable.


Those seemed to work but last night things got worse and he could log in, see his characters but starting a game is impossible. I tried looking for fixes (easier in English, compared to our native language) but I could only find threads of people describing the same issue.


Do you guys know of a fix or of something we could do to make it a bit better? Reddit seems to be dead.