Thanks to both of you !

But Cat, Green pack and red pack are bought with token aren't they ? I never have some... Always needed even when I try to save my red pack for important players getting injured before a big game coming...
Same for blue ones, i regularly check morals of my players, especially before Cup/CL games to make sure they perform at max of their possibilities.
I think I still have a lot to learn in my team management !
I also saw some screenshot with thousands of tokens !! how is that even possible ? xD Even when buying them, it represents so much money !