PHP Core Warning – yii\base\ErrorException

$_GET = [
    'random' => '1791408460',
];

$_COOKIE = [
    '_csrf' => '94a599d1504ddd3f8580626276fb20f9569fbe5d9633b4f887ed10759af8e986a:2:{i:0;s:5:"_csrf";i:1;s:32:"xlZ48c2AEJhIs2TaHJNRz2Xz2Soko7xy";}',
    'topics-session' => '1791748182.308.16517.691187|d197bbbd1d400bd72372bc93068ad169',
    'PHPSESSID' => 'mfk80pruk046968olpnili26e2',
];

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