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Fatal error: Uncaught MercadoPagoException: Peer's Certificate issuer is not recognized. in /home/hipertra/domains/hipertrafego.com.br/public_html/mp/lib/mercadopago.php:509 Stack trace: #0 /home/hipertra/domains/hipertrafego.com.br/public_html/mp/lib/mercadopago.php(564): MPRestClient::exec() #1 /home/hipertra/domains/hipertrafego.com.br/public_html/mp/lib/mercadopago.php(62): MPRestClient::post() #2 /home/hipertra/domains/hipertrafego.com.br/public_html/mp/lib/mercadopago.php(209): MP->get_access_token() #3 /home/hipertra/domains/hipertrafego.com.br/public_html/siteexpress.php(263): MP->create_preference() #4 {main} thrown in /home/hipertra/domains/hipertrafego.com.br/public_html/mp/lib/mercadopago.php on line 509