Not sure if this is the right forum, but I discovered a quirky problem affecting Update Row and Insert Row when the Excel workbook contains cells with comments!
If there's a comment on any cell in the workbook (you can find those by running "File -> Inspect Workbook"), trying to update a table in the same workbook results in an error similar to this:
{
"status": 400,
"message": "Unable to open excel file. File may be corrupted. Please use Excel to recover the file and try again.\r\nclientRequestId: 21d9897b-613f-49f1-a727-30414e7347ab",
"source": "excelconnectionprovider-westus.tip0-westus.p.azurewebsites.net"
}However, Get Row works just fine on the same workbook when cell comments are present.
Once the comment has been removed, Update Row works.
It took a lot of trial and error to find this. Hopefully the community can benefit from my discovery.
Would like to hear from Microsoft if this is a bug, limitation or working as designed.