PHP Core Warning – yii\base\ErrorException

$_GET = [
    'S' => [
        'search' => 'сумка холодильник',
    ],
    'page' => '215',
];

$_COOKIE = [
    '_csrf' => '187a4015b58a6392ecc677aea6dc7dc410e7d273bc0058cfab2069b5fdd46a13a:2:{i:0;s:5:"_csrf";i:1;s:32:"3JsjpFb-aqVntpLlmRN4bJnjId7l7RIb";}',
    'PHPSESSID' => '7e88lff6m1cbi4vhb616lm7c2q',
];

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