title: SSL issue. NET::ERR_CERT_DATE_INVALID
body: <p>Previously I used RapidSSL certificate. After it expired I moved to Lets Encrypt (free ssl) and installed on my server. But site uses still old SQL certificate after couple of refreshes taking new SSL certificate and resources (css, images, scripts) are not loading gives NET::ERR_CERT_DATE_INVALID error.</p>
  
  <p>I restarted Apache couple of times.</p>
  
  <p>I'm using Ubuntu 16.04.</p>