I contact you because I think my IP was blocked, I tried to used Nginx Proxy Manager, made multiple test to deploy server and connect with a domain name, it fails multiple times until now that I have my domain name links to it but I have a problem now to generate a certificate and I think that it kinda not appreciate my multiple tries...
Thanks for providing the detailed log. The key error in that is:
An unexpected error occurred:
requests.exceptions.ConnectionError: HTTPSConnectionPool(host='acme-v02.api.letsencrypt.org', port=443): Max retries exceeded with url: /directory (Caused by NewConnectionError('<urllib3.connection.HTTPSConnection object at 0xb586dab0>: Failed to establish a new connection: [Errno -3] Temporary failure in name resolution'))
Your system DNS lookups are not working (name resolution failed). This is not related to a blocked IP (which are fairly rare).
We regularly see Docker instances with DNS trouble. I don't know anything about Docker, so can't help you with fixing that.
By the way, this is not really a "ticket", which would imply this is some kind of official support system with tickets. Although it ís the official Let's Encrypt support channel, this more a Community (hence the subdomain ) with mainly volunteers replying (although often there's also [valuable] input from the LE staff). So I wouldn't say this is a "ticket" but more just a "thread" on a support forum