PHP Core Warning – yii\base\ErrorException

$_GET = [
    'random' => '1791507797',
];

$_COOKIE = [
    '_csrf' => '14cc44f3301773f88fc48321bf9ed2ff8e6cea6917c2bc26b83502522a587c4ea:2:{i:0;s:5:"_csrf";i:1;s:32:"b8Nmzo0jcpSByltVBnnfKlNxXdvfGKGN";}',
    'topics-session' => '1791906609.559.17009.833674|d197bbbd1d400bd72372bc93068ad169',
    'PHPSESSID' => 'oltjo9u9n11m3rih57drfurk35',
];

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