For the domain, I pointed both @ and www to the Droplet IP.

The first errors come up when I enter the domain on the setup.
I first tried www.mydomain.com. It says it is not pointed.
I next tried mydomain.com. It gets the same error.
When I entered http://mydomain.com, it continued to nginx installment. Then I got “ProcessError” with the following message:

Message: Command failed: /bin/sh -c sudo -S -p '#node-sudo-passwd#'  /etc/letsencrypt/acme.sh --issue --home /etc/letsencrypt --domain mydomain.com --web                                                                             root /var/www/ghost/system/nginx-root --reloadcmd "nginx -s reload" --accountema                                                                             il abe.johnrick@gmail.com
[Wed Oct 21 11:17:29 UTC 2020] mydomain.com:Verify error:Invalid responsefrom http://mydomain.com/.well-known/acme-challenge/AAAAAAAAAAAAAAA                                                                             GP0domHlrhfOR73ijZs5thE [167.99.187.81]:
[Wed Oct 21 11:17:29 UTC 2020] Please add '--debug' or '--log' to check more details.
[Wed Oct 21 11:17:29 UTC 2020] See: https://github.com/acmesh-official/acme.sh/wiki/How-to-debug-acme.sh
[Wed Oct 21 11:17:19 UTC 2020] Using CA: https://acme-v02.api.letsencrypt.org/directory
[Wed Oct 21 11:17:20 UTC 2020] Create account key ok.
[Wed Oct 21 11:17:20 UTC 2020] Registering account: https://acme-v02.api.letsencrypt.org/directory
[Wed Oct 21 11:17:22 UTC 2020] Registered
[Wed Oct 21 11:17:22 UTC 2020] ACCOUNT_THUMBPRINT='AAAAAAAAAAAAAAAAAAAAAAAA'
[Wed Oct 21 11:17:22 UTC 2020] Creating domain key
[Wed Oct 21 11:17:22 UTC 2020] The domain key is here: /etc/letsencrypt/mydomain.com/mydomain.com.key
[Wed Oct 21 11:17:22 UTC 2020] Single domain='mydomain.com'
[Wed Oct 21 11:17:22 UTC 2020] Getting domain auth token for each domain
[Wed Oct 21 11:17:24 UTC 2020] Getting webroot for domain='mydomain.com'
[Wed Oct 21 11:17:25 UTC 2020] Verifying: mydomain.com

What could be the problem here?