fatal error for inserting new product

[antonino78]

Hello,
I installed version 2.0.7.
I feel when I click again to put the product I get this error:
Fatal error: Call to a member function getProductShoppersByStatus() on a non-object in C:\xampp\htdocs\myFolder\administrator\components\com_virtuemart\views\product\view.html.php on line 183
How can I fix?