Fatal error wheen running update.php Kindly assist me in solving this error. It appears once I try to run update.php


  Fatal error: Class CToolsCssCache contains 1 abstract method and must therefore be declared abstract or implement the remaining methods  


This is how my css-cache.inc file looks like;

&lt;?php

/**
 * @file
 * Custom cache implementation for the CTools CSS cache.
 */

class CToolsCssCache implements DrupalCacheInterface {

  /**
   * {@inheritdoc}
   */

  public function clear($cid = NULL, $wildcard = FALSE) {
    // Only clear the caches if the wildcard is set, this ensures that the cache
    // is only cleared when the full caches are cleared manually (eg by invoking
    // drupal_flush_all_caches()), and not on a cron run.
    // @see drupal_flush_all_caches()
    // @see system_cron()
    if ($wildcard) {
      ctools_include('css');
      ctools_css_flush_caches();
    }
  }

  /**
   * {@inheritdoc}
   */
  public function get($cid) {
    return FALSE;
  }

  /**
   * {@inheritdoc}
   */
  public function getMultiple(&amp;$cids) {
    return array();
  }

  /**
   * {@inheritdoc}
   */
  public function isEmpty() {
    return FALSE;
  }

  /**
   * {@inheritdoc}
   */
  public function set($cid, $data, $expire = CACHE_PERMANENT) {
  }

}


I think it is affecting the site such that any updates done cannot display on the live site. I will really appreciate your help.
there are a few steps you need to do:


Please upgrade you  Drupal Core 
Apply this patch: Patch to your Ctools Module, you can be found the file here /includes/css-cache.inc