Issue with Creating a PDF from Url using .Net in localhost (Adobe Services API)

Hello,

I am using the virtually standard code below to create a PDF from Url.  

It is working perfectly when the targetUrl is my app in production (https://ffpro.ca/index) but failing at FileRef.CreateFromURI with an ServiceApiException when the targetUrl is my localhost (https://localhost:xxxxx/index )

Am I missing something? My Service Account credentials are clearly ok for production.  I suspect that Adobe does not have access to my localhost but I don't know what to do to make this work in my development environment.   I tried to disable Norton 360 or safe browser protection without success. 

Any suggestion?

Thanks in advance

Jean-Philippe

ConfigureLogging();

try
{
// Initial setup, create credentials instance.
Credentials credentials = Credentials.ServiceAccountCredentialsBuilder()
.FromFile(Directory.GetCurrentDirectory() + "/pdfservices-api-credentials.json")
.Build();

//Create an ExecutionContext using credentials and create a new operation instance.
ExecutionContext executionContext = ExecutionContext.Create(credentials);
CreatePDFOperation htmlToPDFOperation = CreatePDFOperation.CreateNew();

// Set operation input from a source URL.
//FileRef source = FileRef.CreateFromURI(new Uri("https://ffpro.ca/index"));  // Working properly
FileRef source = FileRef.CreateFromURI(new Uri("https://localhost:xxxxx/index" ));  // Failing properlyhtmlToPDFOperation.SetInput(source);

// Provide any custom configuration options for the operation.
SetCustomOptions(htmlToPDFOperation);

// Execute the operation.
FileRef result = htmlToPDFOperation.Execute(executionContext);

// Save the result to the specified location.
string targetFile = Directory.GetCurrentDirectory() + "/wwwroot" + PDFReportPathName+PDFReportFileName;

result.SaveAs(targetFile);
}
catch (ServiceApiException ex)
{
log.Error("Exception encountered while executing operation", ex);}

...