Operation returned an invalid status code 'Forbidden'

I have .net8 blazor web application and tring to embed Power BI report.  

I'm trying to access Power BI report using Service Principal.

I can get to GetReportInGroup() but returns "Operation returned an invalid status code 'Forbidden'" error when trying to call GenerateTokenAsync(). 

It seems like the error happens when Power BI API is returning the report's access token.

It was working fine couple days ago, and now it is returning the error. 

I have the following licenses.

Any advice would be much appreciated!

Thanks,

Juwon

// Authenticate the service principal, and get an access token which will be used to authenticate the app's requests to Power BI REST API
public async Task<string> GetAdToken()
{
    var tenantId = _configuration["TenantId"];
    var clientId = _configuration["ClientId"];
    var clientSecret = _configuration["ClientSecret"];
    var authorityUri = new Uri($"https://login.microsoftonline.com/{tenantId}");

    var app = ConfidentialClientApplicationBuilder
                .Create(clientId)
                .WithClientSecret(clientSecret)
                .WithAuthority(authorityUri)
                .Build();

    var powerbiApiDefaultScope = "https://analysis.windows.net/powerbi/api/.default";
    var scopes = new string[] { powerbiApiDefaultScope };

    try
    {
        var authResult = await app.AcquireTokenForClient(scopes).ExecuteAsync();
        return authResult.AccessToken;
    }
    catch (Exception ex)
    {
        return ex.Message;
    }
}

// Retrieve the necessary info to embed a Power BI report in the app
public async Task<EmbeddedReportViewModel> GetReportEmbedding(string workspaceId, string reportId)
{
    string accessToken = await GetAdToken();

    // Create a Power BI client which will interact with Power BI's REST API
    var tokenCredentials = new TokenCredentials(accessToken, "Bearer");
    var urlPowerBiServiceApiRoot = "https://api.powerbi.com/";
    var pbiClient = new PowerBIClient(new Uri(urlPowerBiServiceApiRoot), tokenCredentials);

    // Fetch meta data for the desired Power BI report
    var workspaceIdGuid = new Guid(workspaceId);
    var reportIdGuid = new Guid(reportId);
    var report = pbiClient.Reports.GetReportInGroup(workspaceIdGuid, reportIdGuid);

    // Generate embed token which grants permission to view the report
    var tokenRequest = new GenerateTokenRequest(TokenAccessLevel.View, report.DatasetId);
    var embedTokenResponse = await pbiClient.Reports.GenerateTokenAsync(workspaceIdGuid, reportIdGuid, tokenRequest);

    var reportViewModel = new EmbeddedReportViewModel(
        report.Id.ToString(),
        report.Name,
        report.EmbedUrl,
        embedTokenResponse.Token
    );

    return reportViewModel;
}