Php – Fatal error: Uncaught ReflectionException: Class config does not exist

I'm working on an e-commerce project on Laravel 5.8, but since I accidently ran "laravel new" command on the project's folder I get this error when I'm trying to launch the project on a local server:

Fatal error: Uncaught ReflectionException: Class config does not exist in C:\wamp64\www\e-commerce\vendor\laravel\framework\src\Illuminate\Container\Container.php:788
Stack trace:
0 C:\wamp64\www\e-commerce\vendor\laravel\framework\src\Illuminate\Container\Container.php(788): ReflectionClass->__construct('config')
1 C:\wamp64\www\e-commerce\vendor\laravel\framework\src\Illuminate\Container\Container.php(667): Illuminate\Container\Container->build('config')
2 C:\wamp64\www\e-commerce\vendor\laravel\framework\src\Illuminate\Container\Container.php(615): Illuminate\Container\Container->resolve('config', Array)
3 C:\wamp64\www\e-commerce\vendor\laravel\framework\src\Illuminate\Foundation\Application.php(767): Illuminate\Container\Container->make('config', Array)
4 C:\wamp64\www\e-commerce\vendor\laravel\framework\src\Illuminate\Container\Container.php(1227): Illuminate\Foundation\Application->make('config')
5 C:\wamp64\www\e-commerce\vendor\laravel\framework\src\Illuminate\Log\LogManager.php(417): Illuminate\Container\C in C:\wamp64\www\e-commerce\vendor\laravel\framework\src\Illuminate\Container\Container.php on line 788"

The error on line 788 refers to that portion of code:

$reflector = new ReflectionClass($concrete)

This happened after I cloned my repo from Github. Now for every project that I try to run on a local server I get this error.

I tried "composer install", "composer update", "composer dump-autoload" but they all give the same error with this line at the end:
"Script @php artisan package:discover –ansi handling the post-autoload-dump event returned with error code 255".

I checked the .env file to see if there was a namespace issue too, but there's none of it.

Thank you in advance for your help.