Updated to 2.2.8 & my custom extension stopped working

class ExtData extends xPDOSimpleObject {

	function __construct(modX & $modx,array $config = array()) {
						
		$this->modx =& $modx;
				
		$config = array_merge(array(
			'user' => $this->modx->getLoginUserID(),
			'debug' => 'true',
			),$config);
		
		include_once('exthelpers.class.php');
		
		$this->modx->addExtensionPackage('extdata',"[[++core_path]]components/extdata/model/");
		
		$this->modx->lexicon->load('extdata:default');
		
		$this->modx->log(modX::LOG_LEVEL_ERROR,'cons 5');
		
		//$this->modx->setLogLevel(modX::LOG_LEVEL_DEBUG);
		
		if(!$_SESSION['artist']){
			$_SESSION['artist'] = 'newartist';
		}
				
	}

<?php
$classfile = dirname($modx->getOption('core_path')).'/core/components/extdata/controllers/extdata.class.php';

if (file_exists($classfile)) {
    $output = include_once $classfile;
} else {
    $modx->setLogTarget('ECHO');
    $modx->log(modX::LOG_LEVEL_ERROR,'class not found at: '.$file);
}



$scriptproperties['queryData']  = (isset($queryData)) ? $queryData : "";
$scriptproperties['gigid']  = (isset($_POST['edit_gig'])) ? $_POST['edit_gig'] : "";
$scriptproperties['mp3id']  = (isset($_POST['edit_mp3'])) ? $_POST['edit_mp3'] : "";
$scriptproperties['discid']  = (isset($_GET['discid'])) ? $_GET['discid'] : "";
$scriptproperties['placeHolder']  = (isset($placeHolder)) ? $placeHolder : "";


if($_GET['edit_mp3']){

			// we must be trying to edit an mp3!!
			//echo 'editing an mp3!!';

			$scriptproperties['queryData']  = 'GetOneMp3';
			$scriptproperties['mp3id']  = $_GET['edit_mp3'];

}

/*
echo '<pre>';
print_r($scriptproperties);
echo '</pre>';
exit();
*/

if(class_exists('ExtraData') != true) {
   $ExtraData = new ExtData($modx,$scriptproperties);
}


$output = $ExtraData->getData($scriptproperties,$hook);

return $output;

Fatal error: Call to a member function getOption() on a non-object in /home/canad036/public_html/core/xpdo/om/xpdoobject.class.php on line 692

class ExtData extends xPDOSimpleObject {
         function __construct(modX $modx, array $config = array()) {
             $this->modx = $modx;
}