PHP Fail? Nextcloudpi after update

I habe this problem, when i want to enter my nextcloudpi page, i get this:

> <?php
> /**
>  * @copyright Copyright (c) 2016, ownCloud, Inc.
>  *
>  * @author Christoph Wurst <christoph@winzerhof-wurst.at>
>  * @author Joas Schilling <coding@schilljs.com>
>  * @author Jörn Friedrich Dreyer <jfd@butonic.de>
>  * @author Lukas Reschke <lukas@statuscode.ch>
>  * @author Morris Jobke <hey@morrisjobke.de>
>  * @author Robin Appelman <robin@icewind.nl>
>  * @author Roeland Jago Douma <roeland@famdouma.nl>
>  * @author Sergio Bertolín <sbertolin@solidgear.es>
>  * @author Thomas Müller <thomas.mueller@tmit.eu>
>  * @author Vincent Petry <vincent@nextcloud.com>
>  *
>  * @license AGPL-3.0
>  *
>  * This code is free software: you can redistribute it and/or modify
>  * it under the terms of the GNU Affero General Public License, version 3,
>  * as published by the Free Software Foundation.
>  *
>  * This program is distributed in the hope that it will be useful,
>  * but WITHOUT ANY WARRANTY; without even the implied warranty of
>  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
>  * GNU Affero General Public License for more details.
>  *
>  * You should have received a copy of the GNU Affero General Public License, version 3,
>  * along with this program. If not, see <http://www.gnu.org/licenses/>
>  *
>  */
> 
> require_once __DIR__ . '/lib/versioncheck.php';
> 
> try {
> 	require_once __DIR__ . '/lib/base.php';
> 
> 	OC::handleRequest();
> } catch (\OC\ServiceUnavailableException $ex) {
> 	\OC::$server->getLogger()->logException($ex, ['app' => 'index']);
> 
> 	//show the user a detailed error page
> 	OC_Template::printExceptionErrorPage($ex, 503);
> } catch (\OC\HintException $ex) {
> 	try {
> 		OC_Template::printErrorPage($ex->getMessage(), $ex->getHint(), 503);
> 	} catch (Exception $ex2) {
> 		try {
> 			\OC::$server->getLogger()->logException($ex, ['app' => 'index']);
> 			\OC::$server->getLogger()->logException($ex2, ['app' => 'index']);
> 		} catch (Throwable $e) {
> 			// no way to log it properly - but to avoid a white page of death we try harder and ignore this one here
> 		}
> 
> 		//show the user a detailed error page
> 		OC_Template::printExceptionErrorPage($ex, 500);
> 	}
> } catch (\OC\User\LoginException $ex) {
> 	OC_Template::printErrorPage($ex->getMessage(), $ex->getMessage(), 403);
> } catch (Exception $ex) {
> 	\OC::$server->getLogger()->logException($ex, ['app' => 'index']);
> 
> 	//show the user a detailed error page
> 	OC_Template::printExceptionErrorPage($ex, 500);
> } catch (Error $ex) {
> 	try {
> 		\OC::$server->getLogger()->logException($ex, ['app' => 'index']);
> 	} catch (Error $e) {
> 		http_response_code(500);
> 		header('Content-Type: text/plain; charset=utf-8');
> 		print("Internal Server Error\n\n");
> 		print("The server encountered an internal error and was unable to complete your request.\n");
> 		print("Please contact the server administrator if this error reappears multiple times, please include the technical details below in your report.\n");
> 		print("More details can be found in the webserver log.\n");
> 
> 		throw $ex;
> 	}
> 	OC_Template::printExceptionErrorPage($ex, 500);
> }

Cloud somebody help me