Fatal error: Uncaught Error: Class 'Tutor\PaymentGateways\GatewayBase' not found in /home/helicos/prod-helilagon-com/wp-content/plugins/tutor/ecommerce/PaymentGateways/PaypalGateway.php:19 Stack trace: #0 {main} thrown in /home/helicos/prod-helilagon-com/wp-content/plugins/tutor/ecommerce/PaymentGateways/PaypalGateway.php on line 19