502 Bad Gateway (nginx/1.14.0 (Ubuntu)) - node.js

Question

Hi i have a server with multiple subdomain a weird issue started when all domains returned with 502 bad gateway i entered one subdomain and i run npm run dev and it worked but all the remain subdomains still 502, when i go to other subdomain and run npm start the subdomain work while all the other return 502 what should i do.
here's my package for web (on a subdomain)
{
"name": "mmy-route-web",
"version": "0.1.0",
"private": true,
"scripts": {
"dev": "next dev -p 8080",
"build": "next build",
"start": "next start"
},
"dependencies": {
"#fortawesome/free-solid-svg-icons": "^5.15.4",
"#fortawesome/react-fontawesome": "^0.1.16",
"#glidejs/glide": "^3.4.0",
"#mailchimp/mailchimp_marketing": "^3.0.43",
"#popperjs/core": "^2.9.2",
"#stripe/stripe-js": "^1.13.2",
"bootstrap": "^5.0.0-beta3",
"cloudinary-build-url": "^0.2.1",
"cloudinary-react": "^1.7.0",
"cookie": "^0.4.1",
"html-react-parser": "^1.2.6",
"lodash": "^4.17.21",
"next": "10.0.9",
"next-iron-session": "^4.1.12",
"nookies": "^2.5.2",
"npm": "^8.1.0",
"parse": "^3.1.0",
"react": "17.0.2",
"react-dom": "17.0.2",
"react-use-tawk": "^1.0.0",
"sass": "^1.32.8",
"stripe": "^8.145.0",
"styled-components": "^5.2.1",
"swr": "^0.5.5"
},
"browser": {
"child_process": false
}
}
and for my backend (on other subdomain):
{
"name": "parse-server-example",
"version": "1.4.0",
"description": "An example Parse API server using the parse-server module",
"main": "index.js",
"repository": {
"type": "git",
"url": "https://github.com/"
},
"license": "MIT",
"dependencies": {
"#parse/fs-files-adapter": "^1.2.0",
"concurrently": "^7.0.0",
"cors": "^2.8.5",
"express": "^4.17.1",
"jimp": "^0.16.1",
"kerberos": "0.0.24",
"nodemailer": "^6.4.17",
"parse": "~1.8.0",
"parse-dashboard": "^2.1.0",
"parse-server": "*",
"parse-server-cloudinary-adapter": "^1.4.0",
"parse-server-dedicated-email-adapter": "^3.0.6",
"parse-server-email-template-adapter": "^1.0.2",
"parse-server-generic-email-adapter": "0.0.4",
"parse-smtp-template": "^2.2.0",
"slugify": "^1.4.6"
},
"scripts": {
"start": "node index.js",
"dev": "concurrently \"cd server && npm run start\" \"npm run start\""
},
"engines": {
"node": ">=4.3"
}
}