Strapi locales API got 502 on reverse proxy domain Nginx

Questions and Answers
1
System Information
  • Strapi Version: 4.8.2
  • Operating System: Linux / CentOS 7
  • Database: Postgres
  • Node Version: 14.21.3
  • NPM Version: 6.14.18
  • Yarn Version: 1.22.19

I’m configuring strapi using Nginx on CentOS7, I’ve successful on config reverse proxy and my domains work. However, when I get in strapi dashboard, my locales API(/i18n/locales) got 502 and it break the application, I’ve tried again with my IP address (IP:port/admin) and this API works normally, any idea?

type or paste code here

My Nginx configuration:
server {
    if ($host = mydomain.com) {
        return 301 $host$request_uri;
    } # managed by Certbot


    # Listen HTTP
    listen 80;
    listen [::]:80;
    server_name mydomain.com www.mydomain.com;
    root /my-backend/build/index.html;

    # Redirect HTTP to HTTPS
    return 301 https://$host$request_uri;

}
server {
    # Listen HTTPS
    listen 443 http2 ssl;
    listen [::]:443 http2 ssl;
    server_name mydomain.com www.mydomain.com;
    root /my-backend/build/index.html;
    # SSL config
    ssl_certificate /etc/letsencrypt/live/mydomain.com/fullchain.pem; # managed by Certbot
    ssl_certificate_key /etc/letsencrypt/live/mydomain.com/privkey.pem; # managed by Certbot

    # Proxy Config
    location / {
        proxy_pass myip:3000;
        proxy_http_version 1.1;
        proxy_set_header X-Forwarded-Host $host;
        proxy_set_header X-Forwarded-Server $host;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header X-Forwarded-Proto $scheme;
        proxy_set_header Host $http_host;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection "Upgrade";
        proxy_pass_request_headers on;
    }
 location /admin {
        proxy_pass myip:1337/admin;
        proxy_http_version 1.1;
        proxy_set_header X-Forwarded-Host $host;
        proxy_set_header X-Forwarded-Server $host;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header X-Forwarded-Proto $scheme;
        proxy_set_header Host $http_host;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection "Upgrade";
        proxy_pass_request_headers on;
    }

}
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