Fatal error: Uncaught Error: Class "Symfony\Component\Debug\BufferingLogger" not found in C:\mywamp\sites\allsite\calcomposer\vendor\symfony\debug\Tests\Fixtures\LoggerThatSetAnErrorHandler.php:7 Stack trace: #0 {main} thrown in C:\mywamp\sites\allsite\calcomposer\vendor\symfony\debug\Tests\Fixtures\LoggerThatSetAnErrorHandler.php on line 7