Error installing jitsi meet

Hello Team;

i have look at the all solution you used to help the jitsi users during installation
i have an error when am creating let encrypt certificate.
when i run /usr/share/jitsi-meet/scripts/install-letsencrypt-cert.sh
i get below error

Using the webroot path /usr/share/jitsi-meet for all unmatched domains.
Waiting for verification…
Challenge failed for domain meeting.ricta.org.rw
http-01 challenge for xxxx.xxxx.xx.xx
Cleaning up challenges
Some challenges have failed.

IMPORTANT NOTES:

  • The following errors were reported by the server:Domain: xxxx.xxx.xxx.xx
    Type: connection
    Detail: Fetching
    http://xxxx.xx.x.xx/.well-known/acme-challenge/2Em0uryfEqwBqTGgc3vf7uLeW_c1UblwAHe8Kwol-PY:
    Timeout during connect (likely firewall problem)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.

Make sure port 80 is open and that your dns entry is correct

still i am facing the same issue, even my dns entry is correct there is no service is running on 80