PHP Core Warning – yii\base\ErrorException

$_GET = [
    'S' => [
        'search' => 'рюкзак',
        'price_min' => '',
        'price_max' => '',
        'minAmount' => '',
    ],
    'sort' => '-rel',
    'page' => '7',
];

$_COOKIE = [
    'language' => 'ru',
];

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