can't open "http://router IP/user"

hello all
i want to use the user-manager as raduis server to manage users.
now ,i can open “http://router IP/userman” to create a customer/router ,but i can’t open"http://router IP/user" to change the user’s password.
my ROS version is 2.9.27

Notice from mikrotik
http://wiki.mikrotik.com/wiki/User_Manager/User_page#How_to_find.3F
How to find?
User page can be found at address: http://Router_IP_address/user?subs=publicID , where

“Router_IP_address” must be replaced with IP address of your router where the User Manager is running (don’t mix it with the HotSpot router, if User Manager and HotSpot are running on different routers);
publicID must be replaced with public ID of the subscriber who is the owner of this user;
If there is only one subscriber on this router the part “?subs=…” can be skipped, i.e., then the address http://Router_IP_address/user can be used.