title: Failed to open TCP connection
body: <p>While attempting to open a TCP connection to graph.facebook.com, I receive the following error:</p>
  
  <blockquote>
    <p>Failed to open TCP connection to graph.facebook.com:443 (getaddrinfo:
    Name or service not known)</p>
  </blockquote>
  
  <pre><code>TCPSocket.open(conn_address, conn_port, @local_host, @local_port)
          rescue =&gt; e
            raise e, "Failed to open TCP connection to " +
              "#{conn_address}:#{conn_port} (#{e.message})"
          end
        }
  </code></pre>
  
  <p>Help me with this error</p>
  
  <p>I'm using <code>omniauth</code> with Rails 5.0.0.beta3</p>