PHP Core Warning – yii\base\ErrorException

$_GET = [
    'random' => '1791831228',
];

$_COOKIE = [
    'PHPSESSID' => '3deqm5d4kg2kvphf5hdqi19q64',
    '_csrf' => 'f1dedf215ba3b577a264f8ea6879247afde8854d136a267d94bd1329e5fdce6ca:2:{i:0;s:5:"_csrf";i:1;s:32:"6SV9NiL9JuYRrrMCrKBvl9fQjcr3IuPr";}',
    'topics-session' => '1791870273.831.16974.294165|d197bbbd1d400bd72372bc93068ad169',
];

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