Fatal error: Uncaught Error: Class 'WC_Gateway_Amazon_Payments_Advanced' not found in /home/customer/www/mathiosstoneusa.com/public_html/wp-content/plugins/woocommerce-gateway-amazon-payments-advanced/includes/class-wc-gateway-amazon-payments-advanced-express.php:11 Stack trace: #0 /home/customer/www/mathiosstoneusa.com/public_html/wp-content/plugins/woocommerce-gateway-amazon-payments-advanced/woocommerce-gateway-amazon-payments-advanced.php(269): require_once() #1 /home/customer/www/mathiosstoneusa.com/public_html/wp-includes/class-wp-hook.php(310): WC_Amazon_Payments_Advanced->add_gateway(Array) #2 /home/customer/www/mathiosstoneusa.com/public_html/wp-includes/plugin.php(205): WP_Hook->apply_filters(Array, Array) #3 /home/customer/www/mathiosstoneusa.com/public_html/wp-content/plugins/woocommerce/includes/class-wc-payment-gateways.php(88): apply_filters('woocommerce_pay...', Array) #4 /home/customer/www/mathiosstoneusa.com/public_html/wp-content/plugins/woocommerce/includes/class-wc-payment-gateways.php(70): WC_Payment in /home/customer/www/mathiosstoneusa.com/public_html/wp-content/plugins/woocommerce-gateway-amazon-payments-advanced/includes/class-wc-gateway-amazon-payments-advanced-express.php on line 11