laravel 5 Fatal error: Uncaught exception 'ReflectionException' with message 'Class log does not exist' 有大用

I am using the laravel 5. But will result in an error message when you try to access the site. Solution but I do not know how. Do not know anyone solutions?

Fatal error: Uncaught exception 'ReflectionException' with message 'Class log does not exist' in /home/my-project/www/my-project/vendor/compiled.php:1029 Stack trace: #0
/home/my-project/www/my-project/vendor/compiled.php(1029): ReflectionClass->__construct('log') #1 
/home/my-project/www/my-project/vendor/compiled.php(980): Illuminate\Container\Container->build('log', Array) #2 
/home/my-project/www/my-project/vendor/compiled.php(1493): Illuminate\Container\Container->make('log', Array) #3 
/home/my-project/www/my-project/vendor/compiled.php(1072): Illuminate\Foundation\Application->make('Psr\\Log\\LoggerI...') #4 
/home/my-project/www/my-project/vendor/compiled.php(1056): Illuminate\Container\Container->resolveClass(Object(ReflectionParameter)) #5 
/home/my-project/www/my-project/vendor/compiled.php(1042): Illuminate\Container\Container->getDependencies(Array, Array) #6 
/home/my-project/www/my-project/vendor/compiled.php(980): Illuminate\Container\Container->bui in /home/my-project/www/my-project/vendor/compiled.php on line 1029