I'm having the same problem since yesterday. I suspect you were playing friendlies to complete uefa dreamchasers challenges.
if that's so then we most likely experiencing some kind of a soft ban. EA has set a maximum of games you can play in a predetermined period of time, to prevent cheaters etc.
Because of the game mode's rules being first to 1 goal the matches are extremely short, so you reach that limit quite fast even if you didn't something wrong.
That's the best explanation i could come up with. It's definitely EA's fault and we should demand some in-game rewards for such inconvenience.
P.S.: here's a link that may explain the case better
https://x.com/EASFCDirect/status/1452723017717452800
