PowerBIClient gets Groups and Reprots but Fails on ExportToFileInGroupAsync

I am able to successfully connect to and run some methods using the PowerBIClient.  However, when I try to actually render the paginated report I get an exception of "Unable to read data from the transport connection: An existing connection was forcibly closed by the remote host."

Here is the full code:

var accessToken = await tokenAcquisition.GetAccessTokenForUserAsync(new string[] {
	PowerBiScopes.ReadReport,
	PowerBiScopes.ReadDataset,
});

var userInfo = await graphServiceClient.Me.Request().GetAsync();
var userName = userInfo.Mail;

AuthDetails authDetails = new AuthDetails {
	UserName = userName,
	AccessToken = accessToken,
};

var credentials = new TokenCredentials($"{accessToken}", "Bearer");
PowerBIClient powerBIClient = new PowerBIClient(credentials);

var groups = await powerBIClient.Groups.GetGroupsAsync();
var swiftGroup = groups.Value
	.Where(x => x.Name == "SWIFT Application Development")
	.FirstOrDefault();

var swiftReports = await powerBIClient.Reports.GetReportsAsync(swiftGroup.Id);
var s0AuditSheet = swiftReports.Value
	.Where(x => x.Name == "S0 A - Audit Sheet")
	.FirstOrDefault();

var paginatedReportExportConfiguration = new PaginatedReportExportConfiguration {
	ParameterValues = new ParameterValue[] {
		new ParameterValue { Name = "OSCode", Value = "9477"},
	},
	Identities = new List<EffectiveIdentity> { 
		new EffectiveIdentity { Username = "[email protected]" },
	}
};

var exportRequest = new ExportReportRequest {
	Format = FileFormat.PDF,
	PaginatedReportConfiguration = paginatedReportExportConfiguration,
};

Export result = null;

try {
	result = await powerBIClient.Reports.ExportToFileInGroupAsync(swiftGroup.Id, s0AuditSheet.Id, exportRequest);
} catch (Exception e) {
	string b = e.Message;
}

return result.Id;

It gets all the way to the `try` block on the ExportToFileInGroupAsync and then fails with:

Unable to read data from the transport connection: An existing connection was forcibly closed by the remote host.

If I go here and click the Try It button I get a 202 response code and the expected output.  What is the problem here?

If I need to tack on an EffectiveIdentity or something else I need to see actual code please.  I have been pulling out my hair trying to get this last bit to work for a week now.