Your domain name is not a secret, and I need the certbot log, not the NPM log.
It looks like something else is answering:
$ curl -iL raspslabhomer.duckdns.org
HTTP/1.1 404 Not Found
Content-Type: text/plain; charset=utf-8
X-Content-Type-Options: nosniff
Date: Wed, 10 Jan 2024 20:33:28 GMT
Content-Length: 19
404 page not found