Fatal error: Uncaught Error: Class 'Psr\Log\AbstractLogger' not found in C:\xampp\htdocs\print\vendor\symfony\debug\Tests\Fixtures\LoggerThatSetAnErrorHandler.php:7 Stack trace: #0 {main} thrown in C:\xampp\htdocs\print\vendor\symfony\debug\Tests\Fixtures\LoggerThatSetAnErrorHandler.php on line 7