Can't "View in Zoho sheet"

Can't "View in Zoho sheet"

At one time, clicking on "View in Zoho Sheet" from any of the tables containing said link would generate the expected output.

However, for months now, all I receive is a blank output regardless of what I'm attempting to view in Zoho Sheet (Invoices, Customers, Estimates, etc).  Zoho support has failed to get back to me on this issue, so I'm wondering if I'm an isolated case or if others are seeing this issue.  

STR (Steps to Reproduce) are pretty straight-forward. . .Select any "list" (tab) in Zoho Invoice (Invoices or Estimates for example) and click on "View in Zoho Sheet".  For me - nada. . for you?

Feedback appreciated.

Cheers,

ChrisH