[Projects 2.0] :Unable to open Excel spreadsheet in Zoho Sheet from Documents tab

[Projects 2.0] :Unable to open Excel spreadsheet in Zoho Sheet from Documents tab

I receive the following error message when attempting to open an Excel spreadsheet stored in the Documents area:
RESULT=FALSE ERROR_CODE=2851 WARNING=No workbook exists with id... null

I have been able to open the spreadsheet previously, and it's been stored in Documents for several months now.

Any ideas on how to fix this?

T. James Williams