PHP Core Warning – yii\base\ErrorException

$_GET = [
    'random' => '1791475976',
];

$_COOKIE = [
    '_csrf' => 'fb4d126f2718666b716f9b5863919e509a9e8fead3b718e5bd2f5b55a832ca64a:2:{i:0;s:5:"_csrf";i:1;s:32:"JUuwLar8ep9adTIfuPnSP2Li432gEV_P";}',
    'topics-session' => '1791484786.136.16697.604348|d197bbbd1d400bd72372bc93068ad169',
    'PHPSESSID' => 'tk7c6q4m3ocus616ag7j37rfe6',
];

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