I was in contact with epic for over an month, after an insulting message and links to a multiple ammount of threads explaining this error I finally got an answer that helps, I will share it to all of you.
Hello again,
Thank you very much for your feedback.
I completely understand how frustrating this can be.
We are aware that some players are experiencing a compatibility issue with Windows 11 and the Easy Anti-Cheat driver. We’re already looking into ways to fix the issue, but we can’t offer a simple solution at this time.
As soon as a solution is found, it will also be published in an article. I suggest you keep an eye on our X page and Fortnite news.
I’m very sorry that I can’t give you a concrete solution, but I’m keeping my fingers crossed that a solution will be found quickly and I’m also available to answer any other questions you may have.
Best regards,
Epic Games Player Support
We all have to wait or change back to Windows 10 unfortunally.