Can't upload large files using MVC.NET Core application

Question

I have an issue uploading large files in the MVC.NET Core application. No matter what I do I get back a 404 no data response

Here is my task method that uploads file

        [RequestSizeLimit(40000000)]
    public static async Task<string> UploadAttachment(string bis232JsonString, string url, string formType, string token, long maxResponseContentBufferSize)
    {
        var result = "Error";
        try
        {
            // To Do : Use ConfigurationManager.AppSettings["endpoint"];
            string endpoint = $"{url}/{formType}Attachment/post";

            using (var client = new HttpClient())
            {

                client.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Bearer", token);

                client.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));

                //client.MaxResponseContentBufferSize = maxResponseContentBufferSize;

                using (var request = new HttpRequestMessage(HttpMethod.Post, endpoint))
                {
                    request.Content = new StringContent(bis232JsonString, Encoding.UTF8, "application/json");
                    using (var response = await client.SendAsync(request))
                    {
                        if (response.IsSuccessStatusCode && (response.StatusCode == HttpStatusCode.OK || response.StatusCode == HttpStatusCode.NoContent))
                            result = "Success";
                        else
                            result = "Error";
                    }
                }
            }
        }
        catch (Exception ex)
        {
            //to do : Log application error properly
            result = "Error";
        }

        return result;
    }

I tried the following

1. Tried to use MaxResponseContentBufferSize property of HTTP Client
2. Tried to use [RequestSizeLimit(40000000)] decorator
3. Tried to use [DisableRequestSizeLimit] decorator

4. Tried to update the upload limit globally as shown below

       public static IWebHostBuilder CreateWebHostBuilder(string[] args) =>
       WebHost.CreateDefaultBuilder(args)
       .UseStartup<Startup>()
       .UseKestrel(options =>
       {
           options.Limits.MaxRequestBodySize = 52428800; });
   

However, no matter what I try to do, nothing seems to work

Please let me know if there is anything that could be done to make it work