error 500 - white page after update to joomla 3.7.2

Hello from germany,

after update from 3.6.4 to 3.7.2 my componente i create with you tool downt work, i get a blank page with error 500.

i have found the probleme in view.html.php ->

public function display($tpl = null)
{
$app = JFactory::getApplication();

$this->state = $this->get('State');
$this->items = $this->get('Items');
$this->pagination = $this->get('Pagination');
$this->params = $app->getParams('com_***');
$this->filterForm = $this->get('FilterForm');

when i disable this //$this->filterForm = $this->get('FilterForm'); component work great ->


can you help me whats wrong

big thx from germany ilover