Fatal error: Uncaught TypeError: Argument 1 passed to Mage_Catalog_Model_Resource_Product_Collection::addCategoryFilter() must be an instance of Mage_Catalog_Model_Category, null given, called in /home/umgee/public_html/app/design/frontend/tm_themes/theme706/template/catalog/product/list/upsell.phtml on line 51 and defined in /home/umgee/public_html/app/code/core/Mage/Catalog/Model/Resource/Product/Collection.php:717 Stack trace: #0 /home/umgee/public_html/app/design/frontend/tm_themes/theme706/template/catalog/product/list/upsell.phtml(51): Mage_Catalog_Model_Resource_Product_Collection->addCategoryFilter(NULL) #1 /home/umgee/public_html/app/code/core/Mage/Core/Block/Template.php(241): include('/home/umgee/pub...') #2 /home/umgee/public_html/app/code/core/Mage/Core/Block/Template.php(272): Mage_Core_Block_Template->fetchView('frontend/tm_the...') #3 /home/umgee/public_html/app/code/core/Mage/Core/Block/Template.php(286): Mage_Core_Block_Template->renderView() #4 /home/umgee/public_html/app/code/local/Mage/Core/Block/Abst in /home/umgee/public_html/app/code/core/Mage/Catalog/Model/Resource/Product/Collection.php on line 717