title: PermissionError: [Errno 13] Permission denied after ssl
body: <p>Hi after do the ssl via the certbot  for my domain(using nginx)  and when i run my application to see it one the browser i got this error:Traceback (most recent call last):</p>
  <pre><code>  Traceback (most recent call last):
    File &quot;/home/user/.virtualenvs/project/bin/trytond&quot;, line 83, in &lt;module&gt;
      **ssl_args)
    File &quot;/home/user/.virtualenvs/project/lib/python3.7/site-packages/werkzeug/serving.py&quot;, line 1052, in run_simple
      inner()
    File &quot;/home/user/.virtualenvs/project/lib/python3.7/site-packages/werkzeug/serving.py&quot;, line 1005, in inner
      fd=fd,
    File &quot;/home/user/.virtualenvs/project/lib/python3.7/site-packages/werkzeug/serving.py&quot;, line 848, in make_server
      host, port, app, request_handler, passthrough_errors, ssl_context, fd=fd
    File &quot;/home/user/.virtualenvs/project/lib/python3.7/site-packages/werkzeug/serving.py&quot;, line 766, in __init__
      self.socket = ssl_context.wrap_socket(sock, server_side=True)
    File &quot;/home/user/.virtualenvs/project/lib/python3.7/site-packages/werkzeug/serving.py&quot;, line 661, in wrap_socket
      **kwargs
    File &quot;/user/lib/python3.7/ssl.py&quot;, line 1216, in wrap_socket
      context.load_cert_chain(certfile, keyfile)
  PermissionError: [Errno 13] Permission denied
  </code></pre>