Fatal error: Uncaught Error: Class "Stripe\Util\ApiVersion" not found in /home/windevelwb/www/stripe/lib/Stripe.php:26 Stack trace: #0 /home/windevelwb/www/stripe/lib/Stripe.php(114): [constant expression]() #1 /home/windevelwb/www/stripe/create_checkout.php(12): Stripe\Stripe::setApiKey('sk_live_51TJRjA...') #2 {main} thrown in /home/windevelwb/www/stripe/lib/Stripe.php on line 26