Problema error 500 interno

[ruloshop]

Hola tengo un problema en el Area de admin no puedo aceptar pagos o poner Entregado, Cancelar, etc.,

Cada vez que quiero usar esas opciones me da el error 500, pude en Modo Debug y esto es lo que me dice pero nose como corregir, espero su ayuda gracias

Attempted to call function "idn_to_ascii" from the global namespace

 

in classes/Mail.php (line 872)

867.         $address = explode('@', $to);
868.         if (empty($address[0]) || empty($address[1])) {
869.             return $to;
870.         }
872.         return $address[0].'@'.idn_to_ascii($address[1]);
873.     }
875.     /**
876.      * Generic function to dieOrLog with translations.
877.      *

MailCore::toPunycode('[email protected]') in classes/Mail.php (line 317)

312.             $toPlugin = $to[0];
313.         } else {
314.             /* Simple recipient, one address */
315.             $toPlugin = $to;
316.             $toName = (($toName == null || $toName == $to) ? '' : self::mimeEncode($toName));
317.             $message->addTo(self::toPunycode($to), $toName);
318.         }
320.         if (isset($bcc) && is_array($bcc)) {
321.             foreach ($bcc as $addr) {
322.                 $addr = trim($addr);

MailCore::send(5, 'download_product', 'El producto virtual que ha comprado está disponible para descargar', array('{lastname}' => 'Blanco', '{firstname}' => 'RAUL ARNALDO', '{id_order}' => 17, '{order_name}' => 'FMYJDDHNR', '{nbProducts}' => 1, '{virtualProducts}' => '<ul><li><a href="http://better-buy.store/index.php?controller=get-file&key=ab40af09c41131182a4632f6406763a2161f2603-2f7a943e0a8d9289929fb69d0af758a99f476846&id_order=17&secure_key=48088233e6dfe7dfc72721c644afd225">Ho&acute;oponopono Como trabajar la t&eacute;cnica.pdf</a></li></ul>'), '[email protected]', 'RAUL ARNALDO Blanco', '[email protected]', 'Better Buy', null, null, '/home/bettzvnd/public_html/mails/', false, 1) in classes/order/OrderHistory.php (line 180)

175.                         null,
176.                         null,
177.                         null,
178.                         _PS_MAIL_DIR_,
179.                         false,
180.                         (int)$order->id_shop
181.                     );
182.                 }
183.             }
185.             // @since 1.5.0 : gets the stock manager

OrderHistoryCore->changeIdOrderState(5, object(Order), true) in controllers/admin/AdminOrdersController.php (line 535)

531.                         $use_existings_payment = false;
532.                         if (!$order->hasInvoice()) {
533.                             $use_existings_payment = true;
534.                         }
535.                         $history->changeIdOrderState((int)$order_state->id, $order, $use_existings_payment);
537.                         $carrier = new Carrier($order->id_carrier, $order->id_lang);
538.                         $templateVars = array();
539.                         if ($history->id_order_state == Configuration::get('PS_OS_SHIPPING') && $order->shipping_number) {
540.                             $templateVars = array('{followup}' => str_replace('@', $order->shipping_number, $carrier->url));

AdminOrdersControllerCore->postProcess() in classes/controller/Controller.php (line 244)

239.             if (!$this->content_only && ($this->display_header || (isset($this->className) && $this->className))) {
240.                 $this->setMedia();
241.             }
243.             // postProcess handles ajaxProcess
244.             $this->postProcess();
246.             if (!empty($this->redirect_after)) {
247.                 $this->redirect();
248.             }

ControllerCore->run() in classes/Dispatcher.php (line 428)

423.             if (isset($params_hook_action_dispatcher)) {
424.                 Hook::exec('actionDispatcher', $params_hook_action_dispatcher);
425.             }
427.             // Running controller
428.             $controller->run();
430.             // Execute hook dispatcher after
431.             if (isset($params_hook_action_dispatcher)) {
432.                 Hook::exec('actionDispatcherAfter', $params_hook_action_dispatcher);
433.             }

DispatcherCore->dispatch() in betteradmin/index.php (line 99)