502 Bad Gateway

[nckrwlmn]

I keep getting a 502 bad gateway when I try to use the proxy.
Here is the code i am using for the yml file.

version: '3'
services:
app:
image: 'jc21/nginx-proxy-manager:latest'
restart: unless-stopped
ports:
- '80:80'
- '81:81'
- '443:443'
environment:
DB_MYSQL_HOST: "db"
DB_MYSQL_PORT: 3306
DB_MYSQL_USER: "npm"
DB_MYSQL_PASSWORD: "npm"
DB_MYSQL_NAME: "npm"
volumes:
- ./data:/data
- ./letsencrypt:/etc/letsencrypt
db:
image: 'jc21/mariadb-aria:latest'
restart: unless-stopped
environment:
MYSQL_ROOT_PASSWORD: 'npm'
MYSQL_DATABASE: 'npm'
MYSQL_USER: 'npm'
MYSQL_PASSWORD: 'npm'
volumes:
- ./data/mysql:/var/lib/mysql

What could be going on? Ive tried every single tutorial on the internet for this and I cant get it to work on ubuntu 22.

[nckrwlmn]

The issue is, the downstream service is not reachable by the proxy.

If you're having this issue, make sure that you are pointing to the right IP and port and protocol downstream.

And make sure that service is actually running and not rebooting or off.