Getting error when trying to download a pbix

That MS doc needs to be updated.  Folks here's the result of my testing.

I created a report with its own data source so it would publish to the same workspace as the report.

then I made a copy of that report

Then I create in the desktop a new report that used that published shared datasource and published it to the same workspace

Then I made a copy of that report on the service.

Results:

Any report, copy or not, that had its datasource in that workspace downloaded the pbix successfully.  A report with a shared datasource, in that workspace or not, that had been published to the workspace downloaded its pbix successfully.  However any report that was a copy of a report whose datasource was in another workspace failed to download successfully.

Therefore you can download the pbix of a report as long as:

1)  the report is a copy and has its datasource in that workspace

2)  is not a copy and has been published, even if its datasource is in another workspace.

I have not tested any new reports created solely on the service.