SSL/TLS certificate error

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Please fill out the fields below so we can help you better. Note: you must provide your domain name to get help. Domain names for issued certificates are all made public in Certificate Transparency logs (e.g. https://crt.sh/?q=example.com), so withholding your domain name here does not increase secrecy, but only makes it harder for us to provide help.

My domain is: richmon.co.kr

I ran this command: plesk, install Let's Encrypt Cert.

It produced this output: "Could not issue an SSL/TLS certificate for richmon.co.kr
Details Could not issue a Let's Encrypt SSL/TLS certificate for richmon.co.kr. Authorization for the domain failed."

My web server is (include version): plesk / php 8.2.15

The operating system my web server runs on is (include version): WordPress

Previously, a certificate was issued with the relevant ip and domain, and it is not possible to issue a certificate because it is regenerated after deleting the wordpress.

The IP is locked, so I would like to ask you to release it.
IP : 158.247.246.43
domain : richmon.co.kr

4

Let's Debug shows that the HTTP ACME challenge connection requests are being refused:

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This is what I see (and I can see now!)

Host is up (0.17s latency).

PORT    STATE  SERVICE
22/tcp  open   ssh
80/tcp  closed http
443/tcp closed https
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