I can't deploy my strapi version 4 application

Questions and Answers
1

I am trying to deploy my strapi backend version (4.0.2) application to heroku, i tried all solutions but nothing worked, i even followed the steps of deploying strapi to heroku from the docs with a NEW APP, and i got the same error, i manage to start the server and the application work but when i try to open the “/admin” url, it keep loading forever and show “error while requesting the api”.
in url “/” it show me “PRODUCTION” , the date, and “the server is running successfully”

and here what it show in the browser console.log after i open the “/admin” url it keeps loading forever, then after some minutes it shows this:

dfgdfhgfhfd

i need help, anyone please show me details how to deploy a strapi application version 4, i followed the docs step by step even with a newly created app and it didn’t work. i spent some weeks creating an app and i’m stuck in deploying the backend, help please?

here is code of some files:
./config/env/production/database.js

const parse = require('pg-connection-string').parse;
const config = parse(process.env.DATABASE_URL);

module.exports = ({ env }) => ({
  connection: {
    client: 'postgres',
    connection: {
      host: config.host,
      port: config.port,
      database: config.database,
      user: config.user,
      password: config.password,
      ssl: {
        rejectUnauthorized: false
      },
    },
    debug: false,
  },
});

./config/env/production/server.js

module.exports = ({ env }) => ({
  url: env('MY_HEROKU_URL'),
})

./config/server.js

module.exports = ({ env }) => ({
  host: env('HOST', '0.0.0.0'),
  port: env.int('PORT', 1337),
});

./config/database.js

const path = require('path');

module.exports = ({ env }) => ({
  connection: {
    client: 'sqlite',
    connection: {
      filename: path.join(__dirname, '..', env('DATABASE_FILENAME', '.tmp/data.db')),
    },
    useNullAsDefault: true,
  },
});

Please help.

System Information
  • Strapi Version: 4.0.2
  • Operating System: Windows
  • Database: postgresql
  • Node Version: 14
  • NPM Version: 6
  • Yarn Version: