Embed Error SharePoint Online: "Correlation id: undefined...User not found in pbi global discovery"

Hello, as far as I can tell the following embed error has not been addressed in the community so thank you in advance of your reply if you can help.

I'm comfortable with the fundamentals of embedding a Power BI report in a SharePoint Online page using a report link or embed code, but each method produces slightly different errors that are indicating that I'm not signed in properly (though it seems to me that I am) or there may be a problem accessing the report using my own ID. I am an admin on this new SharePoint Online site since my organization recently got Office 365.

When attempting to use a report link, the following error code appears in place of the desired web part:

"An error occurred. Correlation id: undefined, http response status: 404, server error code undefined, message: User not found in pbi global discovery. https://api.powerbi.com/p…"

When attempting to use embed code, in place of the desired web part is a Power BI logo and a sign in button, and to make matters worse the button does not operate.

What am I missing as far as sign in and access to embed my own report? Thank you in advance.

(For the record I use a Microsoft partner account to post to the PBI community, and am not a Microsoft employee like my avatar suggests).