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I am not able to add or edit pages in wordpresss . When i go to the page edit option in wordpress a complete white blank screen is showing with the error message –

(Warning: call_user_func_array() expects parameter 1 to be a valid callback, function ‘wp_cache_set_posts_last_changed’ not found or invalid function name in /home/accounts/public_html/wp-includes/class-wp-hook.php on line 288)

All the things was working fine some days back . I have also tried to deactivate all the plugin to make sure it will not be due to any plugins but even after deactivating the plugins error is still showing.

I have already done lots of R & D to solve this issue but nothing works..

  • What about switching to a default theme keeping plugins disabled? – Max Yudin Mar 15 at 11:23
  • Did your system just get updated? Did someone change something? Tell us what you've tried and details of what is going on so we can help. – rudtek Mar 15 at 19:36

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