Error: "Couldn't Open the Workbook"

[webdevguy]

I have a powerapp that's connected to an excel file stored on OneDrive. When trying to open the excel file online (to add a few columns) I'm getting:

Couldn't Open the Workbook

We're sorry, we couldn't open your workbook. It's possibly corrupt or using a file format that's not supported.

The app is working fine. Why this error and how can I edit the file? 

[v-micsh-msft]

Could you please share more details about the Excel file, specially for the file format?

Any changes has been made for this Excel file? It might be corrupted.

Please take a try with the steps mentioned in the following link, see if that would help:

Repaire a corrupted workbook

Regards,

Michael