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Warning: Missing argument 2 for Piwik\Filesystem::unlinkRecursive(), called in /html/piwik/core/Updates/2.2.0-b15.php on line 24 and defined in /html/piwik/core/Filesystem.php on line 205

Backtrace -->

#0 Piwik\Error::errorHandler(...) called at [/html/piwik/core/Filesystem.php:205]
#1 Piwik\Filesystem::unlinkRecursive(...) called at [/html/piwik/core/Updates/2.2.0-b15.php:24]
#2 Piwik\Updates\Updates_2_2_0_b15::update(...) called at [:]
#3 call_user_func(...) called at [/html/piwik/core/Updater.php:164]
#4 Piwik\Updater->update(...) called at [/html/piwik/plugins/CoreUpdater/CoreUpdater.php:87]
#5 Piwik\Plugins\CoreUpdater\CoreUpdater::updateComponents(...) called at [/html/piwik/plugins/CoreUpdater/Controller.php:381]
#6 Piwik\Plugins\CoreUpdater\Controller->doExecuteUpdates(...) called at [/html/piwik/plugins/CoreUpdater/Controller.php:322]
#7 Piwik\Plugins\CoreUpdater\Controller->runUpdaterAndExit(...) called at [/html/piwik/plugins/CoreUpdater/Controller.php:270]
#8 Piwik\Plugins\CoreUpdater\Controller->index(...) called at [:]
#9 call_user_func_array(...) called at [/html/piwik/core/FrontController.php:505]
#10 Piwik\FrontController->doDispatch(...) called at [/html/piwik/core/FrontController.php:85]
#11 Piwik\FrontController->dispatch(...) called at [/html/piwik/core/dispatch.php:34]
#12 require_once(...) called at [/html/piwik/index.php:47]