Lets Encryptry issue

Hello guys,
I installed jitsi on Debian 10. You can reach now. “https://akiilhan.com
But when i execute ```

Challenge failed for domain akiilhan.com
http-01 challenge for akiilhan.com
Cleaning up challenges
Some challenges have failed.

 - The following errors were reported by the server:

   Domain: akiilhan.com
   Type:   connection
   Detail: Fetching
   Connection reset by peer

   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.

Do you have any solution about it?

try this

and let me know what it says

from what i see, i think you need to check your DNS records. make sure you have the A Record pointing to the server

Actually it is about dns problem. Problem solved when i fix dns issue.