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Response Object

Fatal error: Uncaught TypeError: sizeof(): Argument #1 ($value) must be of type Countable|array, int given in /home/xatdpusb/public_html/vendor/paypal/rest-api-sdk-php/lib/PayPal/Common/PayPalModel.php:176 Stack trace: #0 /home/xatdpusb/public_html/vendor/paypal/rest-api-sdk-php/lib/PayPal/Common/PayPalModel.php(176): sizeof(0) #1 /home/xatdpusb/public_html/vendor/paypal/rest-api-sdk-php/lib/PayPal/Common/PayPalModel.php(278): PayPal\Common\PayPalModel->_convertToArray(Array) #2 /home/xatdpusb/public_html/vendor/paypal/rest-api-sdk-php/lib/PayPal/Common/PayPalModel.php(293): PayPal\Common\PayPalModel->toArray() #3 /home/xatdpusb/public_html/vendor/paypal/rest-api-sdk-php/sample/common.php(154): PayPal\Common\PayPalModel->toJSON(128) #4 /home/xatdpusb/public_html/vendor/paypal/rest-api-sdk-php/sample/common.php(72): ResultPrinter::printObject(Object(PayPal\Api\WebhookEventList), false) #5 /home/xatdpusb/public_html/vendor/paypal/rest-api-sdk-php/sample/common.php(102): ResultPrinter::printOutput('Search Webhook ...', 'WebhookEventLis...', NULL, Array, Object(PayPal\Api\WebhookEventList), false) #6 /home/xatdpusb/public_html/vendor/paypal/rest-api-sdk-php/sample/notifications/SearchWebhookEvents.php(31): ResultPrinter::printResult('Search Webhook ...', 'WebhookEventLis...', NULL, Array, Object(PayPal\Api\WebhookEventList)) #7 {main} thrown in /home/xatdpusb/public_html/vendor/paypal/rest-api-sdk-php/lib/PayPal/Common/PayPalModel.php on line 176