IIS 10 AJAX not working for dotnet core 5 MVC

I am writing an asp dot net core MVC application. Here I am using a GET AJAX call. When I am running my application from Visual Studio it works without any issue. But after deploying to my local IIS 10 server my AJAX call is giving me below error message.

Any help or suggestions why on IIS this is happening?

 GET http://mycrt.geotab/GitLab/GetRackStatus 500 (Internal Server Error)    jquery.js:10099

Here is my AJAX call

$('#rackInfo').click(function () {
    var url = 'GitLab/GetRackStatus'; //http://mycrt.geotab/GitLab/GetRackStatus URL also returns same error
    $.blockUI();
    $.ajax({
        url: url,
        type: "GET",
        success: function (responseHtml) {
            $('#rackInfoResults').replaceWith(responseHtml);
            $('#rackInfoResultsError').hide();
            bindEventsOnRacks();
            $.unblockUI();
        },
        error: function (responseHtml) {
            $('#rackInfoResults').hide();
            $('#rackInfoResultsError').show();
            $.unblockUI();
        }
    });           
});

Here is my controller

public async Task<IActionResult> GetRackStatus()
{
  //Controller code
  return PartialView("_RackStatusPartialView");
}

Here is my launchSettings.json

{
  "iisSettings": {
    "windowsAuthentication": false,
    "anonymousAuthentication": true,
    "iisExpress": {
      "applicationUrl": "http://localhost:53400",
      "sslPort": 44339
    }
  },
  "profiles": {
    "IIS Express": {
      "commandName": "IISExpress",
      "launchBrowser": true,
      "environmentVariables": {
        "ASPNETCORE_ENVIRONMENT": "Development"
      }
    },
    "MyCRT": {
      "commandName": "Project",
      "launchBrowser": true,
      "environmentVariables": {
        "ASPNETCORE_ENVIRONMENT": "Development"
      },
      "dotnetRunMessages": "true",
      "applicationUrl": "https://localhost:5001;http://localhost:5000"
    },
    "Docker": {
      "commandName": "Docker",
      "launchBrowser": true,
      "launchUrl": "{Scheme}://{ServiceHost}:{ServicePort}",
      "publishAllPorts": true,
      "useSSL": true
    }
  }
}

Note: I have tried with below URL in AJAX, and that Gives me below error

http://localhost/GitLab/GetRackStatus

Access to XMLHttpRequest at 'http://localhost/GitLab/GetRackStatus' from origin 'http://mycrt.geotab' has been blocked by CORS policy: No 'Access-Control-Allow-Origin' header is present on the requested resource.
Failed to load resource: net::ERR_FAILED

Here is my IIS profile