Failed to find the world in already loaded world package

Hi everyone,

I try to move some folders with Unreal. And I don’t know why Unreal is so bad for these things. So my map is corrupted and I am very happy to lose my time on this thing.
“Failed to find the world in already loaded world package” when I try to load my project

Impossible to move files or maps without the game exploding. Even unity is doing better, I can’t stand losing everything anymore, unreal is lagging behind simple things like that.

If anyone can help?

have a nice day