Fatal error: Uncaught Error: Class 'Stripe_Util_Set' not found in /var/www/static/includes/stripe/stripe-php-1.17.3/lib/Stripe/Object.php:18 Stack trace: #0 /var/www/static/includes/stripe/stripe-php-1.17.3/lib/Stripe/Object.php(265): Stripe_Object::init() #1 {main} thrown in /var/www/static/includes/stripe/stripe-php-1.17.3/lib/Stripe/Object.php on line 18