Module Official PrestaShop Checkout error on configuration

[bibidinu]

hi I have a problem when I try to configured the module remains loading and an error is released in the logs

[16-Jan-2020 14:51:58 Europe/Rome] PHP Fatal error:  Uncaught Error: Call to undefined function getallheaders() in /public_html/modules/ps_checkout/controllers/front/DispatchWebHook.php:71
Stack trace:
#0 /public_html/classes/controller/Controller.php(312): ps_checkoutDispatchWebHookModuleFrontController->display()
#1 /public_html/classes/Dispatcher.php(515): ControllerCore->run()
#2 /public_html/index.php(28): DispatcherCore->dispatch()
#3 {main}
  thrown in /public_html/modules/ps_checkout/controllers/front/DispatchWebHook.php on line 71