Well, my workaround no longer works. I'm sure it's that it will only output 7.1 audio which doesn't work with stereo speakers, you can test it by parking up perpendicular to a road and listening to what happens when a Drivatar drives past you: you hear the car approach, then the sound cuts out when they're in front of you and then you hear them drive away - that means it's got the left and right channels (which are the stereo speakers you've got) but the centre channel is missing. If you could set the game to output 2.0 instead of 7.1 (or maybe 5.1) audio it would mix what would've been the centre channel into the stereo pair.
I've just downloaded the free trial of Dolby Atmos and now it's working again.
Edit: So I didn't realise the online bit is supposed to be working... I had assumed it was just offline until the 9th! I get this error every time I try to connect and attempts to retry instantly fail as if it's not even trying to connect:
View attachment 1092051
Haven't figured out a fix yet, there are lots of posts about this in relation to FH4 but no solutions. Teredo is working so I'm at a loss. Any ideas?