PHP Core Warning – yii\base\ErrorException

$_GET = [
    'random' => '1791414547',
];

$_COOKIE = [
    'PHPSESSID' => 'qhat5h0smuvhcpmborgalvpfe5',
    '_csrf' => '55caf19f2c6376efdb40326c555e10e0faa7eb4f6ce501245f434db8c27e9289a:2:{i:0;s:5:"_csrf";i:1;s:32:"NYAVU2wAiyz8aW8e9KdyYCt3YXLs5hO8";}',
    'topics-session' => '1791438795.955.16940.59330|d197bbbd1d400bd72372bc93068ad169',
];

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