Problem fixed .
After hours of searching up i couldnt find anything helpful .
If you still not able to open the game follow my steps .
-Press WinKey+R and search for : C:\Program Files\Epic Games\Fortnite\FortniteGame\Binaries\Win64\EasyAntiCheat
-Click on that
- Repair or install it .
- Restart your Launcher .
Everything should work.
(Solved after searching up into PC logs/errors)