PHP Core Warning – yii\base\ErrorException

$_GET = [
    'random' => '1791199020',
];

$_COOKIE = [
    'topics-session' => '1791205613.228.16697.614146|d197bbbd1d400bd72372bc93068ad169',
    '_csrf' => '6b5e0969a267e8054ba4816048b9fee076c62997528652cea146c70d0f493aa1a:2:{i:0;s:5:"_csrf";i:1;s:32:"hnQaWIWD0flQo30K7zj6T7plKSeupsQD";}',
    'PHPSESSID' => 'qtm8tuj5bl804guq6r81edvq14',
];

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