Sketchup - Unexpected File Format error

Emergency Pls help me out
Unexpected error while opening my skp file - i have worked on it for past 12hrs
Nothing i could get even in backup file and i checked in temprory file too everything shows same error
But i can see the Thumbnaill and file size

Please help i have attached the file link anyone please

https://drive.google.com/drive/folders/1qDHAzkjU86wmOrlvDndpFHIfiA9SDsYN?usp=sharing