I’ve done this on my webite:
wp-settings – line 37 :
change
$input = array_merge($_GET, $_POST, $_COOKIE, $_SERVER, $_ENV, $_FILES, isset($_SESSION) && is_array($_SESSION) ? $_SESSION : array());
to
$input = array_merge($_GET, $_POST, $_COOKIE, $_SERVER, $_ENV, $_FILES);
This worked for me… but I don’t know if some new troubles will arrive then 😀