PHP Core Warning – yii\base\ErrorException

$_GET = [
    'random' => '1791675775',
];

$_COOKIE = [
    'PHPSESSID' => 'l2djnpiupe6cl89ra742rgj1a1',
    'topics-session' => '1791824704.461.16855.265270|d197bbbd1d400bd72372bc93068ad169',
    '_csrf' => '72cc65a6ec63e16c8aadbc9d3ba454bfd7d03b172dc5e0127c9c65d0befe22eaa:2:{i:0;s:5:"_csrf";i:1;s:32:"WZ-osN3gKTl0X4ER2Y24oNKFfcLdNDXQ";}',
];

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