I have a form.
It's checked: $isValid = $form->isValid($this->getRequest()->getPost())
The problem is errors are empty.
$form->getErrors()
returns array {"field1": [], "field2": [], "field3": [], "field4": []}
when form is invalid.
So inner arrays are empty. What should I do to find why form is invalid? Code is not developed by me, but there is nothing suspicious in it.