Invalid Roster Settings

I would like to ask if there any suggestions for how i can deal with a message stating "Invalid Roster Settings" in red. It appears now when i try to advance the game and i cannot progress past the current day. Im two years into this save and really don't want to have to call it quits because of this message that is blocking me. Is there anything i can do about this as i have already checked my depth chart and there is nothing showing red in there in terms of the depth and minutes matrix. I have a roster of 15 players which i believe is not above allowed limits. Despite the game date being March 2022 i then just prior to this message appearing I received several new emails in my game inbox dated in June. They were all to do with off season tasks and rosters but as the season is still underway i paid them no attention and deleted them.
Any light anyone can shed on what i can do to fix this would be massively appreciated.
Any light anyone can shed on what i can do to fix this would be massively appreciated.