PHP Core Warning – yii\base\ErrorException

$_GET = [
    'random' => '1790921573',
];

$_COOKIE = [
    'PHPSESSID' => 'bu6g1dv7fm7fo1k0sr7q22ohq1',
    '_csrf' => 'da8179d75f9e4e9a74aaba053745b9b5d2c01d0814a88cbf959cc463889aea61a:2:{i:0;s:5:"_csrf";i:1;s:32:"23HlXwZgYveytVEWFIP9uVH9u5aJUQ8T";}',
    'topics-session' => '1790986389.749.16697.567751|d197bbbd1d400bd72372bc93068ad169',
];

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