That's why I can't play the game anymore (someone tips)?
I don't play this game, but had the developers announced that they would take the game offline because it no longer generates any sales?
The game does enough
If the launcher says it has no updates, then you should be able to start it from the launcher too.
Click where your games are on Fortnite, if it says play, start it from there.
In an emergency, only a new installation will help.