Empty Scene, Hierachy Empty? HELP

Hi, I have been working on this project for weeks and everything was working smoothly and fine until today…
I seem to have an empty hierarchy - no cameras, no assets, scenes … ect. Its just blank.
I’ve been searching for answers and help with no conclusion… I have tried deleting the library folder/temps, tried re-importing assets and still nothing… Please help me…as I am on a dead end…

I have other scenes and they work fine, But this is the main and most important scene and losing this means losing everything to me…

Hoping you guys can help me! Thank you all.

anxiously waiting,
N.

Have the same from time to time. I reduce the window (rectangle next to the cross to close the window) and it fix the issue.