Trying to view an embedded report and getting 403 error

Hi,

I'm working on a proof of concept for my organization for which will decide whether future Power BI development is done.  We're trying to embed a report.

I've followed https://docs.microsoft.com/en-us/power-bi/developer/embed-sample-for-customers and have made progress up to being able to generate embed tokens.  However, when I plug in the token to the power bi javascript library, I get a 403 error here:

https://wabi-us-east2-redirect.analysis.windows.net//explore/reports/<id>/modelsAndExploration --> 403 error, that I see on the web console.

Just as a test, I used the rest api to list reports, and found the embedUrl, and tried that.  It just has a page with the power bi logo pulsating but nothing happens.

I've double checked everything I can think of, and all the permissions and setup seems correct.  If anyone has any insights or suggestions I would be very grateful.  Thanks!