Discord can definitely do some strange things to your machine. I can't play DayZ when it's open, the game will not connect to any servers and errors out with this "player auth login state" message. I thought it was my internet connection but running a server locally also resulted in the same error.
It took me a few months of on-and-off searching, but I eventually found a comment on a message board where someone had experimented with things by closing different sets of applications and then trying to connect to a DayZ server. They finally figured out it was Discord that was causing the issue.
It took me a few months of on-and-off searching, but I eventually found a comment on a message board where someone had experimented with things by closing different sets of applications and then trying to connect to a DayZ server. They finally figured out it was Discord that was causing the issue.