I hope somebody can help me here. I am totally not experienced with technical issues in Magento. I receive an error starting my site. Someone similar with this issue? Hope you guys can get me online!
Fatal error: Undefined class constant ‘CACHE_GROUP’ in /home/deb126395/domains/lapparts.nl/public_html/app/code/core/Mage/Core/Block/Abstract.php on line 1075