I am trying to register a new customer and after filling everything i am clicking continue, but every time i get
Fatal error: Call to a member function validate() on a non-object in /home/interkit/interkit.kiev.ua/www/catalog/controller/account/register.php on line 362

this line

if ((utf8_strlen($this->request->post['email']) > 96) || !$this->ocstore->validate($this->request->post['email'])) {

I am using opencart 1.5.5.1

And also I cheked theme on second domain, and there was the same thing.

I think its a problem with theme .