PHP Core Warning – yii\base\ErrorException

$_GET = [
    'S' => [
        'search' => 'рюкзак',
    ],
    'page' => '106',
];

$_COOKIE = [
    'PHPSESSID' => '1d9vmf8kruf6njifg9sj18i0oi',
    '_csrf' => 'e92d8850c99174a7b03a14e5c90f76416c4d7f5d6123ec11d0b59b32776f5bb3a:2:{i:0;s:5:"_csrf";i:1;s:32:"ToxwZW04T-NDa3v1w7x-MFKaxpzvFxEL";}',
];

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