First of all - I have checked all questions on this topic and nothing have worked, so posting here .
My DNS are right - DNS Checker - DNS Propagation Check & DNS Lookup -> the IP is as it should be -
My domain is:
I ran this command:
sudo certbot --nginx -d izberi.site -d www.izberi.site
It produced this output:
(...) IMPORTANT NOTES: - The following errors were reported by the server: Domain: izberi.site Type: connection Detail: Fetching http://izberi.site/.well-known/acme-challenge/MywSvfeJLQ07NRyoV2PwMvd1EXTJ7RzsjuUuY9_sJnY: Connection refused Domain: www.izberi.site Type: connection Detail: Fetching http://www.izberi.site/.well-known/acme-challenge/TM_gxtpjwzz6Xiz9M9V235yci6qjHwH8xEUX90_buzU: Connection refused To fix these errors, please make sure that your domain name was entered correctly and the DNS A/AAAA record(s) for that domain contain(s) the right IP address. Additionally, please check that your computer has a publicly routable IP address and that no firewalls are preventing the server from communicating with the client. If you're using the webroot plugin, you should also verify that you are serving files from the webroot path you provided.
My web server is (include version):
Ubuntu 18.04 - Droplet by Dig. Ocean
I can login to a root shell on my machine (yes or no, or I don't know):
certbot --version -> certbot 0.27.0