Using RestSharp to aend files between to API's on Kubernetes

Question

So I have to API's running on Kubernetes. One has a controller function as such:

string filePath = "/blobs/data/runsession/" + folderName;
if (!Directory.Exists(filePath))
    return null;

var tempFile = Path.Combine(Path.GetTempPath(), guid.ToString());
logger.Info("GetTempPath()" + Path.GetTempPath());
logger.Info("Temp path is: " + tempFile);
ZipFile.CreateFromDirectory(filePath, (tempFile + ".zip"));

byte[] fileBytes = File.ReadAllBytes(tempFile + ".zip");

HelpMethods.GetNetworkTimeStamp("Stop", 2);

return fileBytes;

This controller method works fine and when I call it from postman it returns a file.

Now in the other API I want to call this function from one of my service classes as such:

public async Task<byte[]> DownloadRunSession(string foldername)
{
    try
       {
         var request = new RestRequest($"blob/{foldername}")
         {
             Timeout = -1,
         };

         var response = await client.ExecuteGetAsync(request);

         if (!response.IsSuccessful)
         {
             Console.WriteLine("File download failed");
             Console.WriteLine(response.Content.ToString());
             return null;
          }

          return response.RawBytes;

      }catch(Exception e)
       {
         Console.WriteLine(e.Message);
         Console.WriteLine(e.StackTrace);
         return null;
       }

Now the server logs on the API that sends the file Give me a status 200 but says "the application aborted the connection", and the API that is supposed to receive the file gets no response and the response variable is always "null".

Any one that has had a similar dilemma and knows how to solve it?