PHP Core Warning – yii\base\ErrorException

$_GET = [
    'S' => [
        'search' => 'сумка холодильник',
    ],
    'page' => '159',
];

$_COOKIE = [
    '_csrf' => '5b3aaaf24e13c6cf25cb457bc04d799b039a155a112dc3309c544e2269bb5fc5a:2:{i:0;s:5:"_csrf";i:1;s:32:"usyg6p2v3tRKrdhGmOxjLhQqAI6bm484";}',
    'PHPSESSID' => 'edt4tcdqi169fc74f61sig49od',
];

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