Fatal error: Uncaught MercadoPagoException: SSL certificate problem: unable to get local issuer certificate in C:\xampp\htdocs\wpsoft\mp\mpp\lib\mercadopago.php:509 Stack trace: #0 C:\xampp\htdocs\wpsoft\mp\mpp\lib\mercadopago.php(564): MPRestClient::exec(Array) #1 C:\xampp\htdocs\wpsoft\mp\mpp\lib\mercadopago.php(61): MPRestClient::post(Array) #2 C:\xampp\htdocs\wpsoft\mp\mpp\lib\mercadopago.php(353): MP->get_access_token() #3 C:\xampp\htdocs\wpsoft\mp\mpp\creauser.php(10): MP->post(Array, Array) #4 {main} thrown in C:\xampp\htdocs\wpsoft\mp\mpp\lib\mercadopago.php on line 509