title: kendo.saveAs "Download excel" is not working on server but working on local machine
body: <p>I have implemented the Kendo.saveAs fro download the template and it is working on local env but while uploading it on server it stop working and showing bellow error. <strong>500 Internal server Error</strong></p>
  <p>Code:</p>
  <pre><code> kendo.saveAs({
          dataURI: &quot;data:text/plain;base64,SGVsbG8gV29ybGQh&quot;,
          fileName: &quot;Mytemplate.xlsx&quot;,
          proxyURL: TemplateUrl,
          forceProxy: true
      });
  </code></pre>
  <p>controller:</p>
  <pre><code>   public ActionResult Download(string contentType, string base64, string fileName)
      {
          return File(
              System.IO.File.ReadAllBytes(Path.Combine(
                  ControllerContext.HttpContext.Server.MapPath(&quot;~/Areas\\MyApp\\UploadTemplates&quot;), fileName)),
              System.Net.Mime.MediaTypeNames.Application.Octet, fileName);
      }
  </code></pre>