I received code written in .NET and Angular and made a change to the registration process. I replaced the existing SMS/Email sending mechanism with a new one that uses an API call. After publishing the app, the site loads correctly, but SMS/email sending fails when running on IIS Local. However, if I run IIS Express in the background from within Visual Studio, the sending works both from the published site and from the local host. As soon as I stop running IIS Express in Visual Studio, SMS and email sending fails again from the published site.

Why does running IIS Express affect IIS Local, and why does SMS/email sending not work from the published site when IIS Express is not running in the background? I hope it’s clear.

For reference, here is the code I edited for the API call:

request = new RestRequest("send-sms", Method.Post) { RequestFormat = DataFormat.Json };
request.AddJsonBody(new
                    {
                        MessageText = otpMsg.Body,
                        SenderName = otpMsg.SenderName,
                        RecipientPhone = otpMsg.To
                    });


var response = _client.Execute(request);

Thanks in advance for any help!

Not really sure what to try as I’m new to this.