PHP Core Warning – yii\base\ErrorException

$_GET = [
    'S' => [
        'search' => 'сумка холодильник',
    ],
    'page' => '14',
];

$_COOKIE = [
    '_csrf' => '9056cd8fe4d4b9a52596a2f8c8cd124816dd0a95bbcb7e32747ad429145f5e96a:2:{i:0;s:5:"_csrf";i:1;s:32:"PK8Eduq-K9x9AXpFUapjIYYMkpeV8vEH";}',
    'PHPSESSID' => '26oks5qa84s389mqdvlg0gl86o',
];

$_SESSION = [
    '__flash' => [],
];