PHP Core Warning – yii\base\ErrorException

$_GET = [
    'random' => '1790883036',
];

$_COOKIE = [
    'topics-session' => '1790892695.913.16477.59394|d197bbbd1d400bd72372bc93068ad169',
    'PHPSESSID' => '5tgqk5neemiurc63l8ae5eui35',
    '_csrf' => '25c94497958da05c543eba91c26ad055c6a70289c237043117a0ccc04c122e8ba:2:{i:0;s:5:"_csrf";i:1;s:32:"9hzfnzyPJtljI3tfhTBvfW2JxpDcJ9vG";}',
];

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