Fortnite to unknown process has crashed?

Moin, I can't start my game since today, every time I click on "launch", the error message comes as you can see in the picture below. I've been trying anything for 3 hours on the internet but it just has not helped anything yet. Now I hope that here one or the other drives around, who can help me. I would be very grateful for an answer.

meal

If I understood correctly, it says that the game can't find some files. Try to download the game again.