Fatal error: Uncaught Error: Class "WC_Payment_Gateway" not found in /var/www/html/wp-content/plugins/3d-print-service/includes/class-invoice-gateway.php:4
Stack trace:
#0 /var/www/html/wp-content/plugins/3d-print-service/3d-print-service.php(21): require_once()
#1 /var/www/html/wp-settings.php(560): include_once('/var/www/html/w...')
#2 /var/www/html/wp-config.php(144): require_once('/var/www/html/w...')
#3 /var/www/html/wp-load.php(50): require_once('/var/www/html/w...')
#4 /var/www/html/wp-blog-header.php(13): require_once('/var/www/html/w...')
#5 /var/www/html/index.php(17): require('/var/www/html/w...')
#6 {main}
  thrown in /var/www/html/wp-content/plugins/3d-print-service/includes/class-invoice-gateway.php on line 4