PHP Core Warning – yii\base\ErrorException

$_GET = [
    'random' => '1791556695',
];

$_COOKIE = [
    '_csrf' => '85051c5c9335d2ffdcd4cc86dc2a16e03c58e1baa71ae4cdb766fc53ca27732fa:2:{i:0;s:5:"_csrf";i:1;s:32:"2fF2TdC_Kze5Zu6ijTW-AQU7LnHLrLYN";}',
    'PHPSESSID' => '721cj8v96m4v7e7n6l5ep36su7',
    'topics-session' => '1791963888.632.16490.469541|d197bbbd1d400bd72372bc93068ad169',
];

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