Power BI - PowerBIEntityNotFound Error in Embed Report

Typically, PowerBIEntityNotFound indicates that the requested resource (report, dataset, or workspace) could not be found under the access token's permissions. 

{

    "error": {

        "code": "PowerBIEntityNotFound",

        "pbi.error": {

            "code": "PowerBIEntityNotFound",

            "parameters": {},

            "details": [],

            "exceptionCulprit": 1

        }

    }

}

You need to check a couple of things.

1. Ensure the workspace GUID is accurate. 

You can find it in the URL when viewing a report:

https://app.powerbi.com/groups/{workspace-id}/reports/{report-id}

2. Is the Report ID correct?

    same steps as above.

3. Does the service principal have access?

Your Azure AD app (service principal) must be added to the workspace as a member or admin:

Go to Power BI Service → Workspace → Access

Add the service principal (client ID) as a Member or Admin

4. Ensure service principal access is enabled in tenant settings

In Power BI Admin Portal: Go to Tenant settings

Enable:

"Allow service principals to use Power BI APIs"

"Allow service principals to create embed tokens."

5. Ensure you are using the correct scope and authority in the token request.

SCOPE = "https://analysis.windows.net/powerbi/api/.default"

Check all the above steps, and it will resolve the issue.