PHP Core Warning – yii\base\ErrorException

$_GET = [
    'random' => '1791413049',
];

$_COOKIE = [
    'PHPSESSID' => 'ehhmnnns1co9p3jvmecqfmg907',
    'topics-session' => '1791562526.473.16490.460158|d197bbbd1d400bd72372bc93068ad169',
    '_csrf' => 'ccc90a324d21ecfa680b0ef33b0456b4deb2731863be95081aca34d116b6c94ea:2:{i:0;s:5:"_csrf";i:1;s:32:"D7f0QLMGo5Tji6wZ-nImJrB8Lzw2QkKh";}',
];

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