2019-01-16 12:32:18.499878 [NOTICE] [216.33.196.25:58577] [STDERR] PHP Fatal error:  Uncaught exception 'MercadoPagoException' with message 'error setting certificate verify locations:
  CAfile: /var/www/html/cacert.pem
  CApath: /etc/ssl/certs' in /var/www/html/mercadopago.php:507
Stack trace:
#0 /var/www/html/mercadopago.php(562): MPRestClient::exec(Array)
#1 /var/www/html/mercadopago.php(67): MPRestClient::post(Array)
#2 /var/www/html/mercadopago.php(89): MP->get_access_token()
#3 /var/www/html/mercadopago.php(97): MP->get_payment('3189594428')
#4 /var/www/html/mercadopaiddipn.php(11): MP->get_payment_info('3189594428')
#5 {main}
  thrown in /var/www/html/mercadopago.php on line 507