Laravel blank white screen after modification

My laravel site working well. But after modification i faced with a blank white screen and no logs.

If I run below command :

php -cli artisan clear-compiled

I have this error :

Fatal error: Uncaught exception 'ReflectionException' with message 'Class log does not exist' in /data/devPhp/workspace/adhesion/vendor/laravel/framework/src/Illuminate/Container/Container.php:734 Stack trace: #0 /data/devPhp/workspace/adhesion/vendor/laravel/framework/src/Illuminate/Container/Container.php(734): ReflectionClass->__construct('log') #1 /data/devPhp/workspace/adhesion/vendor/laravel/framework/src/Illuminate/Container/Container.php(629): Illuminate\Container\Container->build('log', Array) #2 /data/devPhp/workspace/adhesion/vendor/laravel/framework/src/Illuminate/Foundation/Application.php(697): Illuminate\Container\Container->make('log', Array) #3 /data/devPhp/workspace/adhesion/vendor/laravel/framework/src/Illuminate/Container/Container.php(849): Illuminate\Foundation\Application->make('Psr\Log\LoggerI...') #4 /data/devPhp/workspace/adhesion/vendor/laravel/framework/src/Illuminate/Container/Container.php(804): Illuminate\Container\Container->resolveClass(Object(ReflectionParameter)) #5 /data/devPhp/workspac in /data/devPhp/workspace/adhesion/vendor/laravel/framework/src/Illuminate/Container/Container.php on line 734

via Chebli Mohamed