Fatal error: Uncaught TypeError: Iyzipay\Model\Mapper\PlusInstallmentPaymentMapper::mapPlusInstallmentPaymentFrom(): Argument #2 ($jsonObject) must be of type object, null given, called in /app/api/vendor/iyzico/iyzipay-php/src/Iyzipay/Model/Mapper/PlusInstallmentPaymentMapper.php on line 18 and defined in /app/api/vendor/iyzico/iyzipay-php/src/Iyzipay/Model/Mapper/PlusInstallmentPaymentMapper.php:12 Stack trace: #0 /app/api/vendor/iyzico/iyzipay-php/src/Iyzipay/Model/Mapper/PlusInstallmentPaymentMapper.php(18): Iyzipay\Model\Mapper\PlusInstallmentPaymentMapper->mapPlusInstallmentPaymentFrom(Object(Iyzipay\Model\PlusInstallmentPayment), NULL) #1 /app/api/vendor/iyzico/iyzipay-php/src/Iyzipay/Model/PlusInstallmentPayment.php(13): Iyzipay\Model\Mapper\PlusInstallmentPaymentMapper->mapPlusInstallmentPayment(Object(Iyzipay\Model\PlusInstallmentPayment)) #2 /app/api/vendor/iyzico/iyzipay-php/samples/create_plus_installment_payment.php(83): Iyzipay\Model\PlusInstallmentPayment::create(Object(Iyzipay\Request\CreatePlusInstallmentPaymentRequest), Object(Iyzipay\Options)) #3 /app/api/vendor/iyzico/iyzipay-php/samples/create_plus_installment_payment.php(87): createPlusInstallmentPayment() #4 {main} thrown in /app/api/vendor/iyzico/iyzipay-php/src/Iyzipay/Model/Mapper/PlusInstallmentPaymentMapper.php on line 12