Good Morning,
I got this error message:

So it looks like it is an "Unsupported Data Source- The workbook contains Power Query queries that can't be refreshed in Excel for the web." Do you have suggestions of what I could do to remedy this error. Others have the same error.
Yes, use "real", aka desktop, Excel.
Sorry, online Excel is too dumbed down to support PowerQuery. In other words, no PowerQuery in Excel Online/for the web.
.
oops ... 
I googled to find confirmation looking for this page "Power Query data sources in Excel versions"
https://support.microsoft.com/en-us/office/power-query-data-sources-in-excel-versions-e9332067-8e49-46fc-97ff-f2e1bfa0cb16
which itself contradicted me
.
Instead I first found this contradiction, then later found the above link ...
https://docs.microsoft.com/en-us/power-query/connectors/excel
specifically this section, notice the "Authentication Kind" option/drop down box
<snip>
Connect to an Excel workbook from Power Query Online
To make the connection from Power Query Online:
- Select the Excel option in the connector selection.
- In the Excel dialog box that appears, provide the path to the Excel workbook.

- If necessary, select an on-premises data gateway to access the Excel workbook.
- If this is the first time you've accessed this Excel workbook, select the authentication kind and sign in to your account (if needed).
- In Navigator, select the workbook information you want, and then Transform Data to continue transforming the data in Power Query Editor.

</snip>
So it seems to be possible.
Color me surprised.