title: Syncfusion Error: Could not load file or assembly 'Syncfusion.XlsIORenderer.Portable, Version=20.2140.0.44, Culture=neutral, PublicKeyToken=3d67...'
body: <p>I am working on the spreadsheet module and trying to save a test file. I'm using angular with web api.
  Here is the api code:</p>
  <pre><code>    [HttpPost]
      [Route(&quot;save&quot;)]
      public IActionResult SaveConflict([FromForm] SaveSettings saveSettings, string customParams)
      {
          
          try
          {            
              return Workbook.Save(saveSettings);
          }
          catch (Exception ex)
          {
              var msg = ex.Message;
              return null;
          }
      }
  </code></pre>
  <p>It's throwing the following error:
  Could not load file or assembly 'Syncfusion.XlsIORenderer.Portable, Version=20.2140.0.44, Culture=neutral, PublicKeyToken=3d67ed1f87d44c89'. The system cannot find the file specified.</p>