Why did my scene turn red?

I opened my project like everyday and everything is covered by red light. Didn’t change anything and it was working fine for months. I open it today and it’s red doesn’t matter what I do. Tried switching all objects off and on. Deleting them and inserting them new the red light keeps being here. I tried opening it in both 4.18.3 in which I worked before and in the newest update too but it doesnt matter. What went wrong?


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