PHP Core Warning – yii\base\ErrorException

$_GET = [
    'S' => [
        'search' => 'сумка холодильник',
    ],
    'page' => '41',
];

$_COOKIE = [
    '_csrf' => '61aad000c2d687131bdac0f0eaea544f243d4447c9cd3b0a0c7ec5fb62c31d74a:2:{i:0;s:5:"_csrf";i:1;s:32:"pOk_aKzsFfue-CdkY82iV5qblTQ1uWmG";}',
    'PHPSESSID' => '6h0pfpn2gmf1oi8nailqcmtrks',
];

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