Fatal error: Uncaught Error: Interface "Payplug\Core\IHttpRequest" not found in /var/www/html/includes/alpha/payplug/Payplug/Core/CurlRequest.php:7 Stack trace: #0 {main} thrown in /var/www/html/includes/alpha/payplug/Payplug/Core/CurlRequest.php on line 7