Hello, I've been setting up a couple of journals and now I have a problem.

[01-Jun-2017 22:04:33 Europe/Berlin] PHP Warning: Declaration of ArticleSearch::formatResults($results) should be compatible with SubmissionSearch::formatResults(&$results) in C:\xampp\htdocs\ojs-3.0.2\classes\search\ArticleSearch.inc.php on line 19
[01-Jun-2017 22:04:33 Europe/Berlin] PHP Warning: Declaration of ArticleSearch::formatResults($results) should be compatible with SubmissionSearch::formatResults(&$results) in C:\xampp\htdocs\ojs-3.0.2\classes\search\ArticleSearch.inc.php on line 19
[01-Jun-2017 22:04:33 Europe/Berlin] PHP Warning: Declaration of PageHandler::authorize($request, &$args, $roleAssignments) should be compatible with PKPHandler::authorize($request, &$args, $roleAssignments, $enforceRestrictedSite = true) in C:\xampp\htdocs\ojs-3.0.2\controllers\page\PageHandler.inc.php on line 19
[01-Jun-2017 22:04:33 Europe/Berlin] PHP Fatal error: Uncaught Error: Call to undefined method PageHandler::setEnforceRestrictedSite() in C:\xampp\htdocs\ojs-3.0.2\controllers\page\PageHandler.inc.php:36
Stack trace:
\#0 C:\xampp\htdocs\ojs-3.0.2\lib\pkp\classes\core\PKPRouter.inc.php(364): PageHandler->authorize(Object(Request), Array, Array)
\#1 C:\xampp\htdocs\ojs-3.0.2\lib\pkp\classes\core\PKPComponentRouter.inc.php(262): PKPRouter->_authorizeInitializeAndCallRequest(Array, Object(Request), Array)
\#2 C:\xampp\htdocs\ojs-3.0.2\lib\pkp\classes\core\Dispatcher.inc.php(134): PKPComponentRouter->route(Object(Request))
\#3 C:\xampp\htdocs\ojs-3.0.2\lib\pkp\classes\core\PKPApplication.inc.php(227): Dispatcher->dispatch(Object(Request))
\#4 C:\xampp\htdocs\ojs-3.0.2\index.php(68): PKPApplication->execute()
\#5 {main}
thrown in C:\xampp\htdocs\ojs-3.0.2\controllers\page\PageHandler.inc.php on line 36
Hope someone could help me, thanks in advance.