PHP Core Warning – yii\base\ErrorException

$_GET = [
    'random' => '1791616397',
];

$_COOKIE = [
    'topics-session' => '1791894420.628.16475.553136|d197bbbd1d400bd72372bc93068ad169',
    'PHPSESSID' => 'sm52ijkm2ludca9quvts7okb22',
    '_csrf' => '9ea6f33094e73fd440eb58038ca1fb14c9f4048ad41d3cd3caf6da9d0448cccba:2:{i:0;s:5:"_csrf";i:1;s:32:"OfsfBvK27OmPrWu7odpd4nlDfeBUaPr8";}',
];

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