Failed to start game Madden 21

I am struggling to play H2H Seasons games in Madden 21 Ultimate Team on PS4.

I have managed to play a few, but more often than not, I get a 'Failed to Start A Game!' message after about 10 seconds in the loading screen.

I then try to go back into matchmaking, then the games simply hangs on a 'Searching For An Opponent' screen, with no way of backing out.

I do not believe I have any issues on my side. I am a long standing FIFA player and can easily connect to the dedicated on-line servers for FUT. I also have Duma OS on my Netgear Router, so have a good insight into my connectivity inc Geo-Filter Settings, open ports etc etc.

I am able to access MUT to play solo challenges without any issues. Is this a known problem and is there a fix? Or is this an account level issue?

Thanks in advance.