Fatal error: Uncaught Error: Class 'Assetic\Filter\BaseProcessFilter' not found in /home/lafaamicps/www/symfony/vendor/kriswallsmith/assetic/src/Assetic/Filter/OptiPngFilter.php:23 Stack trace: #0 {main} thrown in /home/lafaamicps/www/symfony/vendor/kriswallsmith/assetic/src/Assetic/Filter/OptiPngFilter.php on line 23