Problem binding to port 80: Could not bind to IPv4 or IPv6 letsencrypt

The solution for this is noted below

Problem binding to port 80: Could not bind to IPv4 or IPv6 letsencrypt

Solution

You just need to stop all running servers like Apache, nginx or OpenShift 
before doing this.

### Stop Nginx
sudo systemctl stop nginx

### Stop Apache2
sudo systemctl stop apache2

Try other methods by searching on the site. That is if this doesn’t work