I installed Magento on my local server. When I tried to add new category then I got a fatel error. What I did and what I got: I click on catalog > Manage Categories I got Fatal error: Call to undefined method Mage_Adminhtml_Block_Widget::getrowurl() in …..app/code/core/Mage/Adminhtml/Block/Widget/Grid.php on line 1607 I tried to find out the error…