Uncaught ReflectionException: Class App\Http\Kernel does not exist in /project/vendor/laravel/framework/src/Illuminate/Container/Container.php:721

When I try to run my Laravel project by using

php -S localhost:8000

or

php artisan serve

it throws this error log

PHP Fatal error:  Uncaught ReflectionException: Class App\Http\Kernel does not exist in /var/www/project/vendor/laravel/framework/src/Illuminate/Container/Container.php:721
Stack trace:
#0 /var/www/project/vendor/laravel/framework/src/Illuminate/Container/Container.php(721): ReflectionClass->__construct('App\\Http\\Kernel')
#1 /var/www/project/vendor/laravel/framework/src/Illuminate/Container/Container.php(600): Illuminate\Container\Container->build('App\\Http\\Kernel')
#2 /var/www/project/vendor/laravel/framework/src/Illuminate/Container/Container.php(567): Illuminate\Container\Container->resolve('App\\Http\\Kernel')
#3 /var/www/project/vendor/laravel/framework/src/Illuminate/Foundation/Application.php(708): Illuminate\Container\Container->make('App\\Http\\Kernel')
#4 /var/www/project/vendor/laravel/framework/src/Illuminate/Container/Container.php(246): Illuminate\Foundation\Application->make('App\\Http\\Kernel', Array)
#5 /var/www/project/vendor/laravel/framework/src/Illuminate/Container/Container.php(718): Ill in /var/www/project/vendor/laravel/framework/src/Illuminate/Container/Container.php on line 721

I have tried deleting vendor folder and reinstalling through composer by using this command

composer install

but it didn't work. I have tried to debug and tried all the possible solutions available on this platform but I was unable to resolve the error. I have tried these commands as well

 php artisan config:clear
 php artisan cache:clear
 composer update
 composer dump-autoload 

but unfortunetly none of them worked. Please help me to solve this issue.

via Chebli Mohamed