Apache 2 - AH02311: Fatal error initialising mod_ssl
<p>I'm trying to set up a Godaddy SSL certificate on a DigitalOcean droplet running Ubuntu with Apache 2. After I've configured the certificates correctly (to the best I can see &amp; according to the following articles:</p>

<ul>
<li><a href="https://www.digitalocean.com/community/tutorials/how-to-create-a-self-signed-ssl-certificate-for-apache-in-ubuntu-16-04#step-2-configure-apache-to-use-ssl" rel="nofollow noreferrer">https://www.digitalocean.com/community/tutorials/how-to-create-a-self-signed-ssl-certificate-for-apache-in-ubuntu-16-04#step-2-configure-apache-to-use-ssl</a></li>
<li><a href="https://www.digicert.com/ssl-certificate-installation-ubuntu-server-with-apache2.htm" rel="nofollow noreferrer">https://www.digicert.com/ssl-certificate-installation-ubuntu-server-with-apache2.htm</a></li>
<li><a href="https://www.digitalocean.com/community/tutorials/how-to-create-a-ssl-certificate-on-apache-for-ubuntu-14-04" rel="nofollow noreferrer">https://www.digitalocean.com/community/tutorials/how-to-create-a-ssl-certificate-on-apache-for-ubuntu-14-04</a></li>
</ul>

<p>I cannot run Apache and I'm getting the following error:</p>

<p><code>AH02311: Fatal error initialising mod_ssl</code></p>

<p>I've also seen this error:</p>

<p><code>SSL Library Error: error:0B080074:x509 certificate routine</code></p>

<p>both of these are in the <code>error.log</code> file.</p>