Viewport goes black for all my UE5 projects

Hello, I was creating a landscape, I made moutains rivers and lake and I was about to add textures to my landscape. I was in the material folder and when I got back to my level viewport it was black.The viewport is black for all my others Unreal projects.
I have deleted and downloaded UE5, restarted my pc, even made the last update for my GPU.
Does anyone know how to solve this ?

In the main editor window:

Window → Load layout → Default editor layout

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