PHP Core Warning – yii\base\ErrorException

$_GET = [
    'random' => '1791526086',
];

$_COOKIE = [
    '_csrf' => 'de73b0686d6915c258f48f781c7d8628e0a9d5089edf8ba492c0e8dbffb2131aa:2:{i:0;s:5:"_csrf";i:1;s:32:"JJsNok7uXfdVyxCIKqCfwCZli-GQfS8D";}',
    'PHPSESSID' => '3p31c977bhvd4o8apclk5k0t92',
    'topics-session' => '1791543259.221.16511.139520|d197bbbd1d400bd72372bc93068ad169',
];

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