PHP Core Warning – yii\base\ErrorException

$_GET = [
    'random' => '1791015457',
];

$_COOKIE = [
    'PHPSESSID' => 'v4jlre3p2na5m5l1uacfk31h70',
    '_csrf' => '764f1c106da74acd4782a4d42c10ee4f60941f421de8fe96cf4e504dc9488ed8a:2:{i:0;s:5:"_csrf";i:1;s:32:"h_DUc4thpTeg2t9SKdbCSvPi5kvj01TK";}',
    'topics-session' => '1791111388.297.16517.926886|d197bbbd1d400bd72372bc93068ad169',
];

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