AMP Not working - "Welcome to NGINX"

[ThePotatoKing]

The local IP won’t work, because Nginx uses the subdomain to route you to the backend webserver.
You can review the HTTPS setup guide to make sure things are all configured properly.

Setting up secure HTTP (HTTPS) with AMP

[Documentation (2)] There are a number of methods that can be used to set up secure HTTP (HTTPS) within AMP depending on your use case. Note that with AMP Enterprise, use of HTTPS is mandatory. 1. Reverse proxy via nginx (recommended, Linux only) If you use the default getamp.sh setup script to install AMP, and you select the option to set up HTTPS when running that script, AMP installs and configures an nginx reverse proxy and Let’s Encrypt certificate handled by certbot to provide secure …