title: Linux permissions issue when executing wkhtmltopdf-amd64
body: <p>When I run the executable "wkhtmltopdf-amd64" (from Linux), I get the following output:</p>
  
  <pre><code>QPainter::begin(): Returned false============================] 100%
  Error: Unable to write to destination                              
  Exit with code 1 due to http error: 403 Forbidden
  </code></pre>
  
  <p>I have seen in other forums that this is due to lack of permissions to write the temporary file.  Which directory do I need to make writable in order to allow "wkhtmltopdf-amd64" to create the temporary file?</p>