PHP Core Warning – yii\base\ErrorException

$_GET = [
    'random' => '1791615261',
];

$_COOKIE = [
    'topics-session' => '1791683063.976.16975.942470|d197bbbd1d400bd72372bc93068ad169',
    '_csrf' => 'c950071f9814e60021a85463c122921a9626db4c5c37d62b001bf212b48bb58ea:2:{i:0;s:5:"_csrf";i:1;s:32:"_fyR1IatV2ZxESxnX3m-Ou-ZFpq5fHSb";}',
    'PHPSESSID' => 'abtg6k9gplk2c4t7j07msipvi5',
];

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