Fatal error: Uncaught Exception: Wrong type NULL. It should be float for property unit_price in F:\Inetpub\vhosts\sx9.com.br\checkout\vendor\mercadopago\dx-php\src\MercadoPago\Entity.php:459 Stack trace: #0 F:\Inetpub\vhosts\sx9.com.br\checkout\vendor\mercadopago\dx-php\src\MercadoPago\Entity.php(368): MercadoPago\Entity->tryFormat(NULL, 'float', 'unit_price') #1 F:\Inetpub\vhosts\sx9.com.br\checkout\vendor\mercadopago\dx-php\src\MercadoPago\Entity.php(312): MercadoPago\Entity->_setValue('unit_price', NULL) #2 F:\Inetpub\vhosts\sx9.com.br\checkout\detail.php(16): MercadoPago\Entity->__set('unit_price', NULL) #3 {main} thrown in F:\Inetpub\vhosts\sx9.com.br\checkout\vendor\mercadopago\dx-php\src\MercadoPago\Entity.php on line 459