PHP Core Warning – yii\base\ErrorException

$_GET = [
    'random' => '1791105360',
];

$_COOKIE = [
    'topics-session' => '1791197413.471.16477.780033|d197bbbd1d400bd72372bc93068ad169',
    'PHPSESSID' => 'll5okv5khv4jsdia0e7hputdp5',
    '_csrf' => '46c99066b11c4f3dd27cc0672410d0400ecb46a3ec1483f23da948f45ca99d65a:2:{i:0;s:5:"_csrf";i:1;s:32:"A_7kJa6LHEAsCy3GnqLLk1idXEu3IwKZ";}',
];

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