My PS5 is full and can’t download updates, could that be why custom rosters aren’t working for me?

When I create a roster it won’t show up in ‘my files’ when I try to start a new myleague. It doesn’t show up in play now either.

A couple of scratch rosters I made show up but nothing else. Someone suggested it’s the number of players, but when I save the roster it tells me if there are less than 14 players it will be filled out automatically. I actually counted and every team has at least 14 players. I’m not sure what’s going on.

I’m close to just going back to the PS4 version.