Fatal error: Uncaught Error: Class "Phpml\Helper\Optimizer\GD" not found in /home/feham/public_html/sub/work.feham.ir/php-ml/php-ml-master/src/Helper/Optimizer/ConjugateGradient.php:20 Stack trace: #0 {main} thrown in /home/feham/public_html/sub/work.feham.ir/php-ml/php-ml-master/src/Helper/Optimizer/ConjugateGradient.php on line 20