PHP Core Warning – yii\base\ErrorException

$_GET = [
    'S' => [
        'search' => 'сумка холодильник',
    ],
    'page' => '53',
];

$_COOKIE = [
    '_csrf' => 'e216296f5c8c80d1389a796a7894ca113463cdf14d33a0b3fccc39071c39bb73a:2:{i:0;s:5:"_csrf";i:1;s:32:"fHQ0swtc4AqjMTERe9c3DiAetlRXuG0T";}',
    'PHPSESSID' => '4ptfpvk030mbf8c4n9k5g0a4aj',
];

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