laravel public_html files fail to load in shared hosting

My laravel (v5.8) project works fine in localhost , but after i uploaded it to cpanel all images and css and JS files in public html failed to load in the browser and show errors in browser console like :

"Failed to load our-approach.png:1 resource: the server responded with a status of 404 ()" "Failed to load resource: the main.css:1 server responded with a status of 500 ()"

While the framework itself loaded fine and show no errors. I updated php to 7.4 and followed almost every youtube and articles and nothing worked.

index.php modified :

     require __DIR__.'/../laravel/vendor/autoload.php';

     $app = require_once __DIR__.'/../laravel/bootstrap/app.php';

AppServiceProvider.php modified :

        public function register()
        {

           $this -> app -> bind('path.public', function()
           {
                return base_path('public_html');
           });

        }

My project structure in cpanel :

|-- bin 

|-- cache 

|-- laravel (project files without the public folder) 

       |-- app

       |-- bootstrap

       |-- config

       .env

        server.php

        ... and the rest of the files

|-- etc 

|-- logs 

|-- mail 

|-- public_html

       |-- css 

       |-- js 

       |-- img

       .htaccess

       index.php

       ...rest of files