PHP Core Warning – yii\base\ErrorException

$_GET = [
    'random' => '1791373499',
];

$_COOKIE = [
    '_csrf' => '3c26ccc9b5cf54b12260b941bab0663542d0d67dbe39aa122fd63c33b1c01d6ea:2:{i:0;s:5:"_csrf";i:1;s:32:"LThimaq2iFjgi0OLMstaoz9CV1aS6QO3";}',
    'topics-session' => '1791438553.546.16974.619886|d197bbbd1d400bd72372bc93068ad169',
    'PHPSESSID' => 'vh146qbd1rdgp1m5bdl2snfn56',
];

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