PHP Core Warning – yii\base\ErrorException

$_GET = [
    'random' => '1790869269',
];

$_COOKIE = [
    'PHPSESSID' => '8pvefkl7rhccs9ljeg9qub3uo4',
    'topics-session' => '1790884924.31.16517.233462|d197bbbd1d400bd72372bc93068ad169',
    '_csrf' => '8133361002cd94292ddb102122a69ceb0510eae3019497a2150e7a394289bd1aa:2:{i:0;s:5:"_csrf";i:1;s:32:"x4upPlHmHa_cE1M7zCUU3-XYkgM16gD9";}',
];

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