PHP Core Warning – yii\base\ErrorException

$_GET = [
    'random' => '1791489836',
];

$_COOKIE = [
    'topics-session' => '1791616138.098.16958.975803|d197bbbd1d400bd72372bc93068ad169',
    '_csrf' => '0b15b0c895625fedca2626cefc38e40f03799a475e5f6c5351e5ca9a753c12d8a:2:{i:0;s:5:"_csrf";i:1;s:32:"9hUrCC4er4XU1DEZL-b6wMycX0uOZhcS";}',
    'PHPSESSID' => 'l2hueu8jvp3dlmi4bv7a5ba8j5',
];

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