Permanent Users Change Password issue

[vietdungiitb]

Please help, the "Password Manager" win form can not be submitted. The loading window runs forever... I do not know how to fix it
Thanks...

[vietdungiitb]

it is fixed by set comment to: unset($req_d);
public function changePassword(){

	$user = $this->_ap_right_check();
    if(!$user){
        return;
    }

	$req_d      = $this->request->getData();
    //unset($req_d);

    //Set the date and time
    $extDateSelects = [
            'from_date',
            'to_date'
    ];
    foreach($extDateSelects as $d){
        if(isset($req_d[$d])){
            $newDate = date_create_from_format('m/d/Y', $req_d[$d]);
            $req_d[$d] = $newDate;
        }  
    }

    $entity = $this->{$this->main_model}->get($req_d['user_id']);
    unset($req_d['user_id']);

    $this->{$this->main_model}->patchEntity($entity, $req_d);

    if ($this->{$this->main_model}->save($entity)) {
        $this->set(array(
            'success' => true,
            '_serialize' => array('success')
        ));
    } else {
        $message = __('Could not change password');
        $this->JsonErrors->entityErros($entity,$message);
    }           
}