PHP Core Warning – yii\base\ErrorException

$_GET = [
    'S' => [
        'search' => 'сумка холодильник',
    ],
    'page' => '33',
];

$_COOKIE = [
    '_csrf' => '009847e692a4b9c9f014cb376a8a7cbc9d3ddb882e5927d9398dec9ffd134baaa:2:{i:0;s:5:"_csrf";i:1;s:32:"iyvFZqX8wpqlbP-846FzShiluR8qDu1e";}',
    'PHPSESSID' => 'o360jk1k0jdq36gbrq86uqhtjb',
];

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