PHP Core Warning – yii\base\ErrorException

$_GET = [
    'random' => '1791069925',
];

$_COOKIE = [
    'topics-session' => '1791298781.258.16814.628509|d197bbbd1d400bd72372bc93068ad169',
    '_csrf' => 'd1e7afe38a310c13a12e5238d993129486069485d0db82c880249e8aa8f03614a:2:{i:0;s:5:"_csrf";i:1;s:32:"NFAuWWkU1ASyRmTkmXLvU2mNhgrlviZ4";}',
    'PHPSESSID' => 'qqqbc6kplsnu772ps43b3sinn7',
];

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