PHP Core Warning – yii\base\ErrorException

$_GET = [
    'random' => '1791515399',
];

$_COOKIE = [
    'topics-session' => '1791543451.77.16517.499671|d197bbbd1d400bd72372bc93068ad169',
    '_csrf' => '66a4c6fd6809bc40f616c0ac26cd679f83b6a92f4638277ec526f960298c7010a:2:{i:0;s:5:"_csrf";i:1;s:32:"w9GsUY8tDyvGqVuqulRYQ02z87bpUnWH";}',
    'PHPSESSID' => '9vimag0vamuelqik92dtnui8j2',
];

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