Docker connection error

[jhonclavijotro]

Hi, I'm new to Nginx and I've been having trouble creating a proxy for a domain on DuckDNS. I have an Arch Linux-based operating system, and this problem occurs when I try to access the domain after configuring the SSL certificate.
Can anyone suggest a solution?
mydomain.duckdns.org: There is a server found at this domain but it returned an unexpected status code Invalid domain or IP. Is it the NPM server? Please make sure your domain points to the IP where your NPM instance is running.