Fatal error: Uncaught Error: Class "Mike42\GfxPhp\AbstractRasterImage" not found in /var/www/html/vendor/mike42/gfx-php/src/Mike42/GfxPhp/GrayscaleRasterImage.php:4 Stack trace: #0 {main} thrown in /var/www/html/vendor/mike42/gfx-php/src/Mike42/GfxPhp/GrayscaleRasterImage.php on line 4