Here is a file which makes sure you have no such problem and can sign young players more freely throughout European nations.
Enjoy the game.
How to apply No Brexit in FM17
- Move the downloaded file to the editor data folder located at \Documents\Sports Interactive\Football Manager 2017\editor data\ If this folder doesn't exist, create it.
- Run Football Manager 2017 and start a new career. Select this database from the dropdown menu in the top right.