Missing Players

I am missing players when it comes to the games. I have them when I am training them but they are not there in my strategies so I cant use them. Why is this happening?
No idea i would raise a support ticket over this issue
In the strategy building, you must select the players you want to play on the left side of the screen.

If you want to play with a new player, you have to think about the player you want to replace and you must select the new player and move him on the field instead of the player to replace.