PHP Core Warning – yii\base\ErrorException

$_GET = [
    'random' => '1791041927',
];

$_COOKIE = [
    '_csrf' => 'fbaafec98e03470a1235d66917a78dc3bd2b16ca983bb8fcbfed537dcd760bbda:2:{i:0;s:5:"_csrf";i:1;s:32:"6gGvBG3OZNgP5Zs3q2YkRrvh42Q2SY7_";}',
    'topics-session' => '1791210391.66.16814.500274|d197bbbd1d400bd72372bc93068ad169',
    'PHPSESSID' => 'orf9adg0qth66v73ccidqj63i7',
];

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