PHP Core Warning – yii\base\ErrorException

$_GET = [
    'random' => '1791412693',
];

$_COOKIE = [
    'topics-session' => '1791471420.775.16615.68990|d197bbbd1d400bd72372bc93068ad169',
    'PHPSESSID' => '0r2lsd6j7t9rvo9ep66fbs1986',
    '_csrf' => '957dad241c9eaa30aaf5a77e27649c7618a38901c77b209b33676efbcdf82336a:2:{i:0;s:5:"_csrf";i:1;s:32:"Q2kd2nrw3TqaYTtPIcBuWnCeHXTwjoev";}',
];

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