Fatal error: Uncaught Error: Call to undefined function add_action() in E:\www\web\wp-content\plugins\wp-super-cache\inc\delete-cache-button.php:41 Stack trace: #0 E:\www\web\wp-content\plugins\wp-super-cache\wp-cache.php(32): require_once() #1 {main} thrown in E:\www\web\wp-content\plugins\wp-super-cache\inc\delete-cache-button.php on line 41