Champions League - No players trained by club

I've just qualified for the CL with Swindon but when registering players for the competition don't have any players trained by the club so don't appear to beable to submit a squad or even continue the game.

I've tried moving youth team players into first team squad but they don't qualify, any help would much appreciated.

Just pick 21 players instead of the full 25. It will allow you to move on, and you can still play anyone under the age of 21 in the competition.

Thanks alot