请教一下， 这是什么情况？谢谢

　今天登录HDB网站更新租客的信息，点change of Tenant进去, 看到以下信息：

Sorry, we are not able to process your request to update your tenant/tenant's particulars online.

If you need any clarification or assistance on this e-service, pls send us and email at [email protected].

　请问这是什么情况， 之前 online就可以更改啊。谢谢