Error server? error Apache configuration? (1 reply)

Hello everyone, I can not install piwik on my site. May have incorrect configuration of Apache? or there is something missing in the configuration? can someone help me?
Thanks from Italy. ( link error: http://piwikstats.it/piwik/ )

REPORT

There is an error. Please report the message (Piwik 2.0.3) and full backtrace in the Piwik forums (please do a Search first as it might have been reported already!).

Recoverable Error: Argument 3 passed to Piwik\Filesystem::unlinkRecursive() must be an instance of Closure, unknown given, called in /home/piwiksta/public_html/piwik/core/CacheFile.php on line 198 and defined in /home/piwiksta/public_html/piwik/core/Filesystem.php on line 208

Backtrace -->

#0 Piwik\Error::errorHandler(...) called at [/home/piwiksta/public_html/piwik/core/Filesystem.php:208]
#1 Piwik\Filesystem::unlinkRecursive(...) called at [/home/piwiksta/public_html/piwik/core/CacheFile.php:198]
#2 Piwik\CacheFile->deleteAll(...) called at [/home/piwiksta/public_html/piwik/core/Tracker/Cache.php:205]
#3 Piwik\Tracker\Cache::deleteTrackerCache(...) called at [/home/piwiksta/public_html/piwik/core/Filesystem.php:31]
#4 Piwik\Filesystem::deleteAllCacheOnUpdate(...) called at [/home/piwiksta/public_html/piwik/plugins/Installation/Controller.php:107]
#5 Piwik\Plugins\Installation\Controller->welcome(...) called at [:]
#6 call_user_func_array(...) called at [/home/piwiksta/public_html/piwik/core/FrontController.php:117]
#7 Piwik\FrontController->dispatch(...) called at [/home/piwiksta/public_html/piwik/plugins/Installation/Installation.php:70]
#8 Piwik\Plugins\Installation\Installation->dispatch(...) called at [:]
#9 call_user_func_array(...) called at [/home/piwiksta/public_html/piwik/core/EventDispatcher.php:100]
#10 Piwik\EventDispatcher->postEvent(...) called at [/home/piwiksta/public_html/piwik/core/Piwik.php:693]
#11 Piwik\Piwik::postEvent(...) called at [/home/piwiksta/public_html/piwik/core/FrontController.php:363]
#12 Piwik\FrontController->init(...) called at [/home/piwiksta/public_html/piwik/index.php:61]


There is an error. Please report the message (Piwik 2.0.3) and full backtrace in the Piwik forums (please do a Search first as it might have been reported already!).

Warning: usort() expects parameter 2 to be a valid callback, no array or string given in /home/piwiksta/public_html/piwik/core/View.php on line 212

Backtrace -->

#0 Piwik\Error::errorHandler(...) called at [:]
#1 usort(...) called at [/home/piwiksta/public_html/piwik/core/View.php:212]
#2 Piwik\View->render(...) called at [/home/piwiksta/public_html/piwik/plugins/Installation/View.php:52]
#3 Piwik\Plugins\Installation\View->render(...) called at [/home/piwiksta/public_html/piwik/plugins/Installation/Controller.php:120]
#4 Piwik\Plugins\Installation\Controller->welcome(...) called at [:]
#5 call_user_func_array(...) called at [/home/piwiksta/public_html/piwik/core/FrontController.php:117]
#6 Piwik\FrontController->dispatch(...) called at [/home/piwiksta/public_html/piwik/plugins/Installation/Installation.php:70]
#7 Piwik\Plugins\Installation\Installation->dispatch(...) called at [:]
#8 call_user_func_array(...) called at [/home/piwiksta/public_html/piwik/core/EventDispatcher.php:100]
#9 Piwik\EventDispatcher->postEvent(...) called at [/home/piwiksta/public_html/piwik/core/Piwik.php:693]
#10 Piwik\Piwik::postEvent(...) called at [/home/piwiksta/public_html/piwik/core/FrontController.php:363]
#11 Piwik\FrontController->init(...) called at [/home/piwiksta/public_html/piwik/index.php:61]


There is an error. Please report the message (Piwik 2.0.3) and full backtrace in the Piwik forums (please do a Search first as it might have been reported already!).

Notice: Undefined index: email in /home/piwiksta/public_html/piwik/core/Piwik.php on line 245

Backtrace -->

#0 Piwik\Error::errorHandler(...) called at [/home/piwiksta/public_html/piwik/core/Piwik.php:245]
#1 Piwik\Piwik::getSuperUserEmail(...) called at [/home/piwiksta/public_html/piwik/plugins/CorePluginsAdmin/Controller.php:368]
#2 Piwik\Plugins\CorePluginsAdmin\Controller->safemode(...) called at [:]
#3 call_user_func_array(...) called at [/home/piwiksta/public_html/piwik/core/FrontController.php:117]
#4 Piwik\FrontController->dispatch(...) called at [/home/piwiksta/public_html/piwik/core/FrontController.php:258]
#5 Piwik\FrontController::triggerSafeModeWhenError(...) called at [:]


There is an error. Please report the message (Piwik 2.0.3) and full backtrace in the Piwik forums (please do a Search first as it might have been reported already!).

Warning: usort() expects parameter 2 to be a valid callback, no array or string given in /home/piwiksta/public_html/piwik/core/View.php on line 212

Backtrace -->

#0 Piwik\Error::errorHandler(...) called at [:]
#1 usort(...) called at [/home/piwiksta/public_html/piwik/core/View.php:212]
#2 Piwik\View->render(...) called at [/home/piwiksta/public_html/piwik/plugins/CorePluginsAdmin/Controller.php:381]
#3 Piwik\Plugins\CorePluginsAdmin\Controller->safemode(...) called at [:]
#4 call_user_func_array(...) called at [/home/piwiksta/public_html/piwik/core/FrontController.php:117]
#5 Piwik\FrontController->dispatch(...) called at [/home/piwiksta/public_html/piwik/core/FrontController.php:258]
#6 Piwik\FrontController::triggerSafeModeWhenError(...) called at [:]


A fatal error occurred

The following error just broke Piwik (v2.0.3):

Call to undefined method Twig_SimpleFunction::compile()
in
/home/piwiksta/public_html/piwik/vendor/twig/twig/lib/Twig/Node/Expression/Call.php line 29