[Need Help] UE5 rendering orange since changing project files

[Uotsab]

I was running UE5 okay. But after I changed project files, it became orange. The DefaultEngine was somehow damaged. So I deleted it. and copy pasted DefaultEngine, DefaultInput, DefaultGame and DefaultEditor from an old backup. It’s the same orange.
I found that changing skylight indensity to 0 the sky becomes normal. The following pics:

When skylight indensity to 1

When skylight indensity to 0
And here’s how it was:

I want to get back to the last picture. Where lighting was pure.
What else do I do? Please help me if possible…

[Uotsab]

Well, I found I’d copy and replace the Saved folder from my old project and it went okay. And I deleted DefaultEngine.ini to compile a new one from VS project.