PHP Core Warning – yii\base\ErrorException

$_GET = [
    'S' => [
        'search' => 'сумка холодильник',
    ],
    'page' => '100',
];

$_COOKIE = [
    '_csrf' => '0521627186498c8d5640a7e84324ad4d0f076c2890825c5e5c9bb3a5c25b5d28a:2:{i:0;s:5:"_csrf";i:1;s:32:"GKXRM3WW7hxtz1pkT6JrW1iQoPvqrsfs";}',
    'PHPSESSID' => 'o5lau911dhequqg4olqttn1180',
];

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