PHP Core Warning – yii\base\ErrorException

$_GET = [
    'random' => '1791312084',
];

$_COOKIE = [
    '_csrf' => '19b3f4a3fa85495722c1f22a1b6ee17958322c4ad47fb0abe31cf7c3fa4de313a:2:{i:0;s:5:"_csrf";i:1;s:32:"t7HaufeAtzPdJneXxB3IjtBUnQFUAgse";}',
    'topics-session' => '1791427896.283.17008.247193|d197bbbd1d400bd72372bc93068ad169',
    'PHPSESSID' => 'kk7ub8vb475jmu608p1v5bv9p1',
];

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