PHP Core Warning – yii\base\ErrorException

$_GET = [
    'random' => '1791218425',
];

$_COOKIE = [
    '_csrf' => 'a2ae5dd96953a05a552a6cf78223007a7e0fb9e0f9fac6cfa4d304966d8dfa62a:2:{i:0;s:5:"_csrf";i:1;s:32:"-i9eP0inl5kqpiVWlXZ8cRHFmci1y2AQ";}',
    'topics-session' => '1791293233.934.17009.96483|d197bbbd1d400bd72372bc93068ad169',
    'PHPSESSID' => '8bf2m04bcgvo83t9dduvfio2c1',
];

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