Fatal error: Uncaught Verotel\FlexPay\Exception: Invalid merchant ID in /var/www/lindinhas.net/vendor/verotel/flexpay-php-client/src/Verotel/FlexPay/Brand.php:20 Stack trace: #0 /var/www/lindinhas.net/vendor/verotel/flexpay-php-client/examples/purchase.php(6): Verotel\FlexPay\Brand::create_from_merchant_id() #1 {main} thrown in /var/www/lindinhas.net/vendor/verotel/flexpay-php-client/src/Verotel/FlexPay/Brand.php on line 20