I've previously setup SSL certificates using Let's Encrypt on my main domain and various subdomains. The subdomains are on the same droplet, using Virtual Hosts.
Now, however, I have my certificates served via CloudFl...
I have followed this guide (https://www.digitalocean.com/community/tutorials/how-to-install-wordpress-on-ubuntu-14-04?comment=18297), and everything worked correctly except that I cannot change the Wordpress permalink...