PHP Core Warning – yii\base\ErrorException

$_GET = [
    'random' => '1791847313',
];

$_COOKIE = [
    'topics-session' => '1792011786.652.16480.315285|d197bbbd1d400bd72372bc93068ad169',
    'PHPSESSID' => 'gbu45lmm6bvq4m81qse935e1b3',
    '_csrf' => '40cc113785fa5dea377c63d9354ebb737cc2cce1a8bd61b4b62ee4667dbeefe1a:2:{i:0;s:5:"_csrf";i:1;s:32:"oCAxs8xQNIDjRVANUUCozTPnq02uGjUn";}',
];

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