Yeah sorry Rebecca, I have tried to fix this but I am not sure what is causing the issue. I have tried several different methods and the youth system doesn't seem to want to work properly.

Short of me creating custom leagues and cups (which is way more effort than I want to put in right now) I am not able to fix this.

I will be looking to tinker with it in FM22 when it comes out and will actually create full youth leagues with promotion/relegation to go alongside the senior counterparts.

Check the database for the youth teams because the IFA Youth Cup is there twice but no youth league. Clubs full time but the staff is still part time (Half way into first season)