After I've updated a shop from 1.8.0.0 to 1.9.3.3 I'm not able to get past step 1 of the checkout. Logical explanation would be the form_key issue and I've thoroughly investigated the possibility of this causing the problems. As far as I can see it doesn't, at least not directly... Either with the form_key setting enabled or disable I get the same result: no step 2.
When I look at the console of Firefox I get this message:
Call to undefined method Mage_Checkout_OnepageController::isFormkeyValidationOnCheckoutEnabled () in app/code/core/Mage/Checkout/controllers/OnepageController.php on line 373
The referenced code looks like this:
if ($this->isFormkeyValidationOnCheckoutEnabled() && !$this->_validateFormKey()) {
return;
}
Obviously if I delete the first part my checkout works again but this can't be solution.
Apparently I'm missing something here. Checkout is not able to verify the form_key setting or something? Anybody who has experience with this kind of issue?
