PHP Core Warning – yii\base\ErrorException

$_GET = [
    'random' => '1791315666',
];

$_COOKIE = [
    '_csrf' => 'e77949b07080f64851155a9943276f782179cda20db8dccbaa10e13da7b13c0ea:2:{i:0;s:5:"_csrf";i:1;s:32:"Hx0NRPV_YOLTd0OdsRIP_lBn-COPeUCa";}',
    'PHPSESSID' => '0cjfogpa9ddi0305o3b9or71g5',
    'topics-session' => '1791409619.097.16855.156357|d197bbbd1d400bd72372bc93068ad169',
];

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