PHP Core Warning – yii\base\ErrorException

$_GET = [
    'random' => '1790964482',
];

$_COOKIE = [
    'PHPSESSID' => 'tt1r1u6o4jh2qcb5es6cqf9ko7',
    '_csrf' => '08501ae536c85399c4c50d073effc604d7e91f40e3304dca753568b045865099a:2:{i:0;s:5:"_csrf";i:1;s:32:"rDBN6l2Yk78a5pBgU29J97_A3KEsvGMv";}',
    'topics-session' => '1791011652.701.16477.542984|d197bbbd1d400bd72372bc93068ad169',
];

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