Cant open my calc ods file

Using Version: (x64) to create a Calc .ODS file a few days ago. Saved it and exited normall (I think!).

Trouble opening: Getting the message when opening:

The file ‘WORKBOOK - 2017 Vembu K Form 1040 Individual Tax Return - Amendment - with additional Investment interest expense - to be validated - WORKBOOK.ods’ is corrupt and therefore cannot be opened. LibreOffice can try to repair the file.
The corruption could be the result of document manipulation or of structural document damage due to data transmission.
We recommend that you do not trust the content of the repaired document.
Execution of macros is disabled for this document.
Should LibreOffice repair the file?

When clicked Yes, I get the message…

The file ‘$(ARG1)’ could not be repaired and therefore cannot be opened.

Any suggestions on how I can go forward?