PHP Core Warning – yii\base\ErrorException

$_GET = [
    'random' => '1790992873',
];

$_COOKIE = [
    'topics-session' => '1791014606.339.16478.987158|d197bbbd1d400bd72372bc93068ad169',
    'PHPSESSID' => 'bcpfrdh6nj93b16kgv7hn79ou2',
    '_csrf' => 'd3979701e9eeed8f6ed2d2101ce7e196603e76bf80d1f3c3d1158781523a7e50a:2:{i:0;s:5:"_csrf";i:1;s:32:"wdpUR7rNRlcbSXgezQMA_rr787pE5Kyv";}',
];

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