PHP Core Warning – yii\base\ErrorException

$_GET = [
    'random' => '1791305424',
];

$_COOKIE = [
    'PHPSESSID' => '95ql1igs8qi80o3j8grjbl1me1',
    '_csrf' => 'c6cd52246dd920014f4771ed2573b002b400666feb6e1e6d70bd7bde93c1e2a5a:2:{i:0;s:5:"_csrf";i:1;s:32:"UmJ7UjvRlsNqMUE1HqUyzaZZ1vLfzIT8";}',
    'topics-session' => '1791411912.673.16551.545093|d197bbbd1d400bd72372bc93068ad169',
];

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