I installed the one click app WP in Ubuntu 16.04

I have a domain (kranion.com.br) which I configured the DNS using the DO tutorial itself (https://www.digitalocean.com/community/tutorials/how-to-set-up-a-host-name-with-digitalocean)

Everything was working fine: I used to enter in my site, but in the url, there was the IP yet.

So, in Settings > General, I changed both urls to https://kranion.com.br and now, when I try to access (even by the IP), I got ERRCONNECTIONREFUSED.

Thanks.