Same here. I used to get the same on Battle.net, sometimes if I reinstalled it would let me play a session, but sure enough Marionberry would come back up the next time I logged in. No AdGuard, created a Firewall exception, portforward, turned off firewall, got a new router, tried using a wired connection, wifi is over 40mbps, and have played on the PS4 for a couple years but was hoping the switch to Steam on PC would stop the Marionberry issues, but nope. Followed all the recommendations, and still nothing.