When I type a document in writer and save it, it will not open Libre Office can repair but file may be corrupt

I type my file in Libre Office 5.2.2, I have Windows 10. I then save the file before closing. It then will not open the file for me. A message in a box comes up asking me if I want to repair file but the repaired file may be corrupt, when I try to repair you get a blank document. Does anyone know how I can fix this.

Thanking you in anticipation