Power BI SharePoint Online Web Part (Modern Pages) Error 10002

Not sure if anyone else has ran into this yet, or if I need to just open a premier case instead.  The PowerBI web part came out of preview today in our tenant, and I tried to add it to a modern page, but got an error, that I simply cannot find anywhere on the net

Power BI Web Part Error Message

When I ran a Fiddler trace during adding the webpar I got some insight on the error. The SharePoint SP.OAuth.Token/acquire endpoint was trying to connect to the resource "https://analysis.windows.net/powerbi/api" but was getting a status of HTTP 400. 

Fiddler Trace

Anyways, not sure if anyone has had this yet, and if so, what did they do? When I try to browse to the https://analysis.windows.net domain, I get a DNS error, so I'm not sure.  The only real configuration modifications on the SharePoint Service was we are using Azure AD Conditional Access on SharePoint and OneDrive but not PowerBI right now.

Further background: We have Office 365 E5 licenses with the Power BI Pro sku enabled on our users who are testing this.  The web part is no longer in (Preview) in our tenant, which is why I'm pursuing this now.