Fatal error: Uncaught Error: Class 'Assetic\Filter\BaseProcessFilter' not found in /var/www/vhosts/kavli-live/vendor/kriswallsmith/assetic/src/Assetic/Filter/PngoutFilter.php:23 Stack trace: #0 {main} thrown in /var/www/vhosts/kavli-live/vendor/kriswallsmith/assetic/src/Assetic/Filter/PngoutFilter.php on line 23