PHP Core Warning – yii\base\ErrorException

$_GET = [
    'S' => [
        'search' => 'сумка холодильник',
    ],
    'page' => '88',
];

$_COOKIE = [
    'PHPSESSID' => '2bdbui9upa1iicdm67lhui90cd',
    '_csrf' => 'a91d3b1364849a3ea19e74775e65644468fd662cafdfcbe39a06af3b3770a9e2a:2:{i:0;s:5:"_csrf";i:1;s:32:"suARa_rYxX8RKkeCt6cy7pRE6cr_yGYQ";}',
];

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