It was right after I finished a mission, it disconnected me from the strike team, then got a bunch of errors when trying to rejoin them. I quit the game to just try and restart it but then I started getting this error.
There appears to be a geographic element to this. I’m in the UK and had a friend near Michigan experiencing this. I have Nord VPN and took the following steps:
Attempted to connect from UK servers without VPN: worked.
Attempted to connect from Chicago, Illinois Nord VPN Servers: Got the error shown in the post
Attempt to connect from New York, New York Nord VPN Servers: Got in successfully
Swapped back to Chicago: Got the error.
Used UK Nord VPN servers: Got in.
It seems to be something to do with the servers in that region of the USA.
I can all but confirm that this is a localized thing, I live right on the edge of Michigan/indiana and would be connecting to Chicago. Well i booted up a VPN like michael had hinted at, and swapped over to NY, connected just fine.
Just tried logging in after reinstalling the game and was able to get to my character select screen, not sure if reinstalling fixed it or if the ISP issue cleared up.