Black Screen cant do anything

Hello, i need help please. I cant do anything in UE 5. The Editor is black and if i press Play its also black. I reinstalled UE5, but same problem.

Does your PC meet the minimum requirements to run the editor?

Yes, my PC meets the minimum requirements. The PC has an RTX 4080 graphics card, 16GB of RAM, an i9 processor, and 32GB of RAM. It was working fine before, and suddenly everything turned black.