arrays - Fatal error: Call to undefined method ControllerModuleDSocialLogin -

i'm using opencart extention (dsociallogin_v2.3). i've install it, when try activate it, shows error.

fatal error: call undefined method controllermoduledsociallogin::render() in /home/.../admin/controller/module/d_social_login.php on line 247 

can please suggest me why happening , how fix it?

$this->load->model('sale/customer_group');  $this->data['customer_groups'] = $this->model_sale_customer_group->getcustomergroups();  $this->response->setoutput($this->render()); }  protected function validate() {     if (!$this->user->haspermission('modify', 'module/d_social_login')) {         $this->error['warning'] = $this->language->get('error_permission');     } 

for version lower 2.x use

$this->response->setoutput($this->render()); 

for opencart version above 2.x user

$this->response->setoutput($this->load->view('foldername/filename.tpl', $data));