PHP Core Warning – yii\base\ErrorException

$_GET = [
    'S' => [
        'search' => 'сумка холодильник',
    ],
    'page' => '131',
];

$_COOKIE = [
    '_csrf' => 'a2814f1d06284e50656c220a27c3525e9336f6b0d4cc01938e919e613ae4dc4ba:2:{i:0;s:5:"_csrf";i:1;s:32:"h4CnFo-VR6NOiF1Ub8JTedgkqRqisIWy";}',
    'PHPSESSID' => 'ild97e28o9fdfba4s67a2r5b3o',
    'viewed' => '5c8ab7a73e3d5e340c46868c28526b826015da3d8a9928f47dedd8af64fad947a:2:{i:0;s:6:"viewed";i:1;a:1:{i:0;i:125777;}}',
];

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