Error 0:85009S

I am getting the same error today. Is this because of the udpate? 

Same here - cleared cache etc but still coming up after a few moments of play

The game crashes a few minutes after starting due to the same error. I've tried repairing the anti-cheat and, since I purchased it through Steam, I've tried verifying the integrity of my Steam account, but it hasn't fixed the problem.

I won't be able to play BF6 for a while.

This worked for me: 

https://forums.ea.com/discussions/battlefield-6-technical-issues-en/error-code-85009s-fix/13333970

Game repair worked for me.

From Battlefiled Comms twitter

"We have deployed backend fixes which resolved this issue, and we're seeing players successfully logging in and finishing matches. Please make sure you fully restart your game if you're still experiencing disconnections on PC. Thank you for your patience"

No need to mess with files on your PC