When you opened this thread in the Help section, you should have been provided with a questionnaire. Maybe you didn't get it somehow (which is weird), or you've decided to delete it. In any case, all the answers to this questionnaire are required:
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. crt.sh | 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:
I ran this command:
It produced this output:
My web server is (include version):
The operating system my web server runs on is (include version):
My hosting provider, if applicable, is:
I can login to a root shell on my machine (yes or no, or I don't know):
I'm using a control panel to manage my site (no, or provide the name and version of the control panel):
The version of my client is (e.g. output of certbot --version or certbot-auto --version if you're using Certbot):
Well unless you are using the DNS-01 challenge of the Challenge Types - Let's Encrypt you will not succeed. HTTP Port 80 is OPEN and is redirected to HTTPS Port 443 which is not OPEN (filtered in this case).
$ nmap -Pn -p80,443 smartpark.kaisariani.gr
Starting Nmap 7.80 ( https://nmap.org ) at 2023-07-05 08:03 PDT
Nmap scan report for smartpark.kaisariani.gr (192.92.156.20)
Host is up (0.20s latency).
PORT STATE SERVICE
80/tcp open http
443/tcp filtered https
Nmap done: 1 IP address (1 host up) scanned in 4.18 seconds