'Could not determine which URL to request: Stripe_Charge instance has invalid ID

I want to implement Strip payment process in a site. I tried to do it but it's not look working. The error I got is Fatal error: Uncaught exception 'Stripe_InvalidRequestError' with message 'Could not determine which URL to request: Stripe_Charge instance has invalid ID: ' in /home/twassist/public_html/wp-content/themes/inovado/stripe-php-1.7.15/lib/Stripe/ApiResource.php:46 Stack trace: #0 /home/twassist/public_html/wp-content/themes/inovado/stripe-php-1.7.15/lib/Stripe/ApiResource.php(15): Stripe_ApiResource->instanceUrl() #1 /home/twassist/public_html/wp-content/themes/inovado/stripe-php-1.7.15/lib/Stripe/ApiResource.php(8): Stripe_ApiResource->refresh() #2 /home/twassist/public_html/wp-content/themes/inovado/stripe-php-1.7.15/lib/Stripe/Charge.php(14): Stripe_ApiResource::_scopedRetrieve('Stripe_Charge', NULL, NULL) #3 /home/twassist/public_html/wp-content/themes/inovado/functions.php(355): Stripe_Charge::retrieve(NULL) #4 /home/twassist/public_html/wp-content/themes/inovado/functions.php(361): Strip_Code() #5 /home/twassist/public_html/wp-settings.php(291): include('/home/twassist/...') #6 /home/twassist/public_html/wp-config.php( in /home/twassist/public_html/wp-content/themes/inovado/stripe-php-1.7.15/lib/Stripe/ApiResource.php on line 46 Do someone tried it here http://twassistant.com/hire change the quantity. Fill this detail 5555 5555 5555 4444 expiry date 12 / 21 name: anything 121. This will make test payment. When come redirect to the code it's give you this error. Here is the code I tried in my php file. ``` function Strip_Code() { $stripCode = trim($_GET['stripeToken']); if (strlen($stripCode) > 0) { require_once dirname(__FILE__).'/stripe-php-1.7.15/lib/Stripe.php'; Stripe::setApiKey("sk_test_XXXXXXXXXXXXXXX"); $resp = Stripe_Charge::retrieve($$stripCode); var_dump($resp); } } Strip_Code(); ```