Fatal error: Uncaught Error: Undefined class constant 'CACHE_GROUP' in /var/www/nettown.dk/public_html/app/code/core/Mage/Core/Block/Abstract.php:1075 Stack trace: #0 /var/www/nettown.dk/public_html/app/code/core/Mage/Page/Block/Html.php(53): Mage_Core_Block_Abstract->_beforeCacheUrl() #1 /var/www/nettown.dk/public_html/app/code/core/Mage/Core/Model/Layout.php(465): Mage_Page_Block_Html->__construct(Array) #2 /var/www/nettown.dk/public_html/app/code/core/Mage/Core/Model/Layout.php(411): Mage_Core_Model_Layout->_getBlockInstance('Mage_Page_Block...', Array) #3 /var/www/nettown.dk/public_html/app/code/core/Mage/Core/Model/Layout.php(446): Mage_Core_Model_Layout->createBlock('page/html', 'root') #4 /var/www/nettown.dk/public_html/app/code/core/Mage/Core/Model/Layout.php(238): Mage_Core_Model_Layout->addBlock('page/html', 'root') #5 /var/www/nettown.dk/public_html/app/code/core/Mage/Core/Model/Layout.php(204): Mage_Core_Model_Layout->_generateBlock(Object(Mage_Core_Model_Layout_Element), Object(Mage_Core_Model_Layout_Element) in /var/www/nettown.dk/public_html/app/code/core/Mage/Core/Block/Abstract.php on line 1075