Fatal error: Call to undefined method DOMDocument::documentElement() in /var/www/oopro-site/kernel/classes/packageinstallers/ezinstallscript/ezinstallscriptpackageinstaller.php on line 67
Fatal error: eZ Publish did not finish its request

The execution of eZ Publish was abruptly ended, the debug output is present below.

    function customInstallHandlerInfo( $package, $installItem )
    {
        $return = array();

        $itemPath = $package->path() . '/' . $installItem['sub-directory'];
        $xmlPath = $itemPath . '/' . $installItem['filename'] . '.xml';

        $dom =& $package->fetchDOMFromFile( $xmlPath );

        if ( $dom )
            **$mainNode =& $dom->root(); // HERE IT's LINE 67**

        $return['file-path'] = $itemPath . '/' . $mainNode->getAttribute( 'filename' );
        $return['classname'] = $mainNode->getAttribute( 'classname' );

        return $return;
    }