title: VestaCP Error code 2
body: <p>I tried to use <code>Lets Encrypt Support</code> under <code>SSL Support</code> section when I added a new domain name on web panel. I got this error message:</p>
  
  <blockquote>
    <p>Error code: 2</p>
  </blockquote>
  
  <p>which means:</p>
  
  <blockquote>
    <p>E_INVALID   Object or argument is not valid</p>
  </blockquote>
  
  <p><code>Apache2</code> web server and <code>nginx</code> caching server are both active on server and running. Domains are pointed to server with <code>A</code> record, these are working through <code>HTTP</code>.</p>
  
  <p>OS: <code>Ubuntu 16.04.3 LTS (GNU/Linux 2.6.32-042stab125.5 x86_64)</code></p>
  
  <p>VestaCP version: <code>0.9.8-18</code></p>