PHP Core Warning – yii\base\ErrorException

$_GET = [
    'S' => [
        'search' => 'сумка холодильник',
    ],
    'page' => '237',
];

$_COOKIE = [
    'PHPSESSID' => '12bvi9hclibr33jld5ks73qjd3',
    '_csrf' => '71a09964985bba2257720985ae0590e6486912f0fe17ab76c5c270c6b960c6ada:2:{i:0;s:5:"_csrf";i:1;s:32:"jRvuC6_tWqCKZLTc-7YSwcPukDGtr5KP";}',
];

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