Warning: Declaration of QuietSkin::feedback error

If anyone encounters this warning and cannot hide it with changing the line in wp-config.php from true to false , replace define('WP_DEBUG', false); or define('WP_DEBUG', true);
with this : 

ini_set('display_errors','Off');
ini_set('error_reporting', E_ALL );
define('WP_DEBUG', false);
define('WP_DEBUG_DISPLAY', false);

It helped me, so I hope it will help you also 😉

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