Fatal error: Uncaught Error: Class "Phpml\Helper\Optimizer\GD" not found in /home/edepracl/public_html/moodle30/lib/mlbackend/php/phpml/src/Phpml/Helper/Optimizer/ConjugateGradient.php:18 Stack trace: #0 {main} thrown in /home/edepracl/public_html/moodle30/lib/mlbackend/php/phpml/src/Phpml/Helper/Optimizer/ConjugateGradient.php on line 18