I have the game (sims4) but cannot download it

When I go in my EA app, it says I have the base game of Sims4, but the button to download it is grey and non clickable. The add-ons I could download, but not the base game. It is a year (then it was Origin as app) since I played for the last time, on a different laptop. What do I have to do to be able to download the basegame again? TIA