PHP Core Warning – yii\base\ErrorException

$_GET = [
    'random' => '1791013414',
];

$_COOKIE = [
    '_csrf' => 'e0370edba6f7e5cf9eae2fd05f10c53e48ce45ecf006009988b6109f1f823f21a:2:{i:0;s:5:"_csrf";i:1;s:32:"BmHInEehDRH3MbpMrZ-R6678Oly0ayOh";}',
    'topics-session' => '1791073942.247.16490.563723|d197bbbd1d400bd72372bc93068ad169',
    'PHPSESSID' => 'eer2f0fntbvfgji2b8vovb0055',
];

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