PHP Core Warning – yii\base\ErrorException

$_GET = [
    'random' => '1791373364',
];

$_COOKIE = [
    '_csrf' => '8e10cde5bcb1b6377dbf378c77bd8ea21dbd85d83e60fd2d760c243acb12b01ba:2:{i:0;s:5:"_csrf";i:1;s:32:"svpWp0qFSOgvA9eX5l5_H2XE1V3W77j4";}',
    'PHPSESSID' => 'bc69kutnaus9rfvdhncmmh0gg1',
    'topics-session' => '1791444674.343.16517.740469|d197bbbd1d400bd72372bc93068ad169',
];

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