Anyone else getting an error “NETWORK DIAGNOSITICS, unable to join session”? I get the same error every time and have not been able to connect once. This keeps happening ever time I try to do a race not as solo, but as a co-op with other online players or try to do the stunt work events as anything but solo.
I put in a support request but have had no response for over a week. This is annoying, I know others play forza for mostly online play but I’ve never even experienced it.
My network is fine BTW, all other Xbox functions work.
I’ve had similar issues, but the message I keep getting is “The Forza Hrizon 4 server is currently unavailable.” Its been happening to me since this past Wednesday, everything else works fine
https://forums.forza.net/turn10_postst138848_If-you-re-experiencing-Forzathon-shop-crashes--please-read.aspx
If on Xbox it could be that your game hasn’t been updated yet?
If you’re on PC, it could be the problem I had, where Teredo was simply blocking me. I used the following guide to get it to work:
https://support.xbox.com/en-US/xbox-on-windows/social/troubleshoot-party-chat
(and basically the fix for me was as simple as clicking ‘help me fix it’ in the Xbox-app network settings, which of course I only tried after running through option BtoZ first :D)
I had a very stange thing occuring this weekend with FH4 online play:
I had to ACTIVATE the windows firewall. Without the firewall it would not connect for Horizon Life.
Weird, cause I deactivated it in the first place, since it was randomly blocking FH4.
¯_(ツ)_/¯