Fatal error: Uncaught TypeError: call_user_func_array(): Argument #1 ($callback) must be a valid callback, function "p404_check_and_upgrade_database" not found or invalid function name in /homepages/26/d4299188068/htdocs/wordpress/wp-includes/class-wp-hook.php:324 Stack trace: #0 /homepages/26/d4299188068/htdocs/wordpress/wp-includes/class-wp-hook.php(348): WP_Hook->apply_filters() #1 /homepages/26/d4299188068/htdocs/wordpress/wp-includes/plugin.php(517): WP_Hook->do_action() #2 /homepages/26/d4299188068/htdocs/wordpress/wp-settings.php(578): do_action() #3 /homepages/26/d4299188068/htdocs/wordpress/wp-config.php(123): require_once('/homepages/26/d...') #4 /homepages/26/d4299188068/htdocs/wordpress/wp-load.php(50): require_once('/homepages/26/d...') #5 /homepages/26/d4299188068/htdocs/wordpress/wp-content/plugins/complianz-terms-conditions/download.php(12): require_once('/homepages/26/d...') #6 {main} thrown in /homepages/26/d4299188068/htdocs/wordpress/wp-includes/class-wp-hook.php on line 324