Notice: Trying to get property 'newPriceLookupKey' of non-object in /var/www/html/commude/stripe-sample-code/update-subscription.php on line 12

Notice: Trying to get property 'subscriptionId' of non-object in /var/www/html/commude/stripe-sample-code/update-subscription.php on line 14

Fatal error: Uncaught Stripe\Exception\InvalidArgumentException: The resource ID cannot be null or whitespace. in /var/www/html/commude/stripe-sample-code/vendor/stripe/stripe-php/lib/Service/AbstractService.php:94 Stack trace: #0 /var/www/html/commude/stripe-sample-code/vendor/stripe/stripe-php/lib/Service/SubscriptionService.php(102): Stripe\Service\AbstractService->buildPath('/v1/subscriptio...', NULL) #1 /var/www/html/commude/stripe-sample-code/update-subscription.php(14): Stripe\Service\SubscriptionService->retrieve(NULL) #2 {main} thrown in /var/www/html/commude/stripe-sample-code/vendor/stripe/stripe-php/lib/Service/AbstractService.php on line 94