Fatal error: Uncaught Error: Function name must be a string in /app/code/core/Mage/Core/Model/Layout.php:555 Stack trace: #0 /app/code/core/Mage/Core/Controller/Varien/Action.php(390): Mage_Core_Model_Layout->getOutput() #1 /app/code/core/Mage/Catalog/controllers/CategoryController.php(161): Mage_Core_Controller_Varien_Action->renderLayout() #2 /app/code/core/Mage/Core/Controller/Varien/Action.php(418): Mage_Catalog_CategoryController->viewAction() #3 /app/code/core/Mage/Core/Controller/Varien/Router/Standard.php(250): Mage_Core_Controller_Varien_Action->dispatch('view') #4 /app/code/core/Mage/Core/Controller/Varien/Front.php(172): Mage_Core_Controller_Varien_Router_Standard->match(Object(Mage_Core_Controller_Request_Http)) #5 /app/code/core/Mage/Core/Model/App.php(354): Mage_Core_Controller_Varien_Front->dispatch() #6 /app/Mage.php(683): Mage_Core_Model_App->run(Array) #7 /index.php(87): Mage::run('', 'store') #8 {main} thrown in /app/code/core/Mage/Core/Model/Layout.php on line 555