Prestashop error Fatal error: Call to a member function getPageLink() on null in ......file.blockcart.tpl.php

After writing a new controller displaying all products in a shop i got this error message.
don't go so fat, check if you did the same mistake as me
    public function init()
    {
           /parent::init();  //it's required
    }

The controller was written under ps 1.6
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