Fatal error: Class CToolsCssCache contains 1 abstract method and must therefore be declared abstract or implement the remaining methods (DrupalCacheInterface::__construct) in C:\wamp\www\gamenetuk\sites\all\modules\ctools\includes\css-cache.inc on line 52
I got this error message on my web how can I solve this problem?
This issue is documented here https://www.drupal.org/node/2408217
So as stated by Cyclone you should upgrade your Drupal Core to the latest (currently 7.37) https://www.drupal.org/project/drupal
This is advisable for security reasons anyway.