PHP Core Warning – yii\base\ErrorException

$_GET = [
    'random' => '1791589705',
];

$_COOKIE = [
    'topics-session' => '1791918704.835.16697.207183|d197bbbd1d400bd72372bc93068ad169',
    'PHPSESSID' => 'osmj0g7gf48mh0k2nuke5ti5v4',
    '_csrf' => 'c58ac2745cd66c7b109e87625a5c4cd0aa59496e4689a7c9c0224eb15b88e585a:2:{i:0;s:5:"_csrf";i:1;s:32:"bi156lhjZzeBLbgNYq7z_HIRq8jOiztb";}',
];

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