MS-ASPNETCORE-TOKEN' does not match the expected pairing token' when calling deployed .net core API on IIS

Question

I am receiving the following exception in the logs and event viewer when calling an endpoint in a .Net core application (3.1):

'MS-ASPNETCORE-TOKEN' does not match the expected pairing token

I have this application deployed using IIS under the default web site. I had read this exception may be due to a discrepancy with Kestrel and IIS, so I updated the CreateWebHostBuilder() to include UseKestrel() and UseIISIntegration(), specifically in that order.

public static IWebHostBuilder CreateWebHostBuilder(string[] args) =>
  WebHost.CreateDefaultBuilder(args)
  .ConfigureLogging(logger =>
  {
    logger.ClearProviders();
    logger.AddConsole();
    logger.AddDebug();
    logger.AddEventLog();
  })
  .UseStartup<Startup>()
  .UseKestrel()
  .UseIISIntegration();
}

In the appsettings file, I set the url to "Urls": "http://localhost:5001". This doesn't seem to be respected because navigating to that URL brings up 'This page cannot be displayed.' There is a port provided in the log, but I think this is supposed to be the kestrel port:

Now listening on: http://localhost:20274 Application started. Press Ctrl+C to shut down.

I am calling the endpoint at that port. As an additional note, I have this running with the OutofProcess hosting model.

Any suggestions on troubleshooting or resolution for this issue?