This module breaks the functionality, Form API #states.

Hello.

If possible, could you explain to me what is the reason for disconnecting html5 validation?

I have commented on this line and reviewed the code and I don't see anywhere the need to disconnect html5 validation.

I have done tests and so far it works for me.

I will keep you informed.

Thanks for the module.

// Turns off HTML 5 validation, as it breaks the validation/errors.
//$form['#attributes']['novalidate'] = 'novalidate';

I had exactly the same issue. Setting a form element to '#required' => TRUE via the form #states did not work because this module is disabling the client-side validation.

This patch fixes this. I have tested this patch with Chrome, Firefox and Safari.

When vissually hidden the required: TRUE is still working, because the browser will show this popup.