PHP Core Warning – yii\base\ErrorException

$_GET = [
    'random' => '1790931198',
];

$_COOKIE = [
    'topics-session' => '1791183079.129.16482.409156|d197bbbd1d400bd72372bc93068ad169',
    'PHPSESSID' => 'bd2lnc7fp0ebd1t18man2f8j24',
    '_csrf' => '5a83f5336f31fc8657f51349282a9475e91f21f6a8ca5c9c5d9222d03e4120e2a:2:{i:0;s:5:"_csrf";i:1;s:32:"d646ISWDciKaidKKVMJr3GIr5bRbdgO9";}',
];

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