Fatal Error Layout.php on Frontend after staging environment setup

Question

I have recently created a staging environment. Back-end works fine. But when I load my staging site I get the following error:

Fatal error: Class 'Mage_Wishlist_Block_Customer_Sidebar' not found in /html/app/code/core/Mage/Core/Model/Layout.php on line 491

I have tried to fix it by clearing all kinds of Caches, and updating layout.php file (app/code/core/Mage/Core/Model/Layout.php):

$out .= $this->getBlock($callback[0])->$callback[1]();

replaced with this one.

$out .= $this->getBlock($callback[0])->{$callback[1]}();

It didn't work.

Can you please help me resolve this, please?

Answer 1

There is only two scenario when you have this issue

1st as Marius said check the class file exist : app/code/core/Mage/Wishlist/Block/Customer/Sidebar.php

2Nd : please check Mage_Whistlist module is enable in system->configuration->Advanced