What kind of activities do you mean that User Manager should track from HotSpot ?
Make sure you have configured all the settings accordingly to the documentation guide, check that all users are added to User Manager.
Post the information you have in,
ip hotspot active print
So i use for user-manager and 10.5.50.1 and for radius server 127.0.0.1. I don't see any Radius with the users. But most inportant what should i supose to see? After open the browser? The User-manager screen or the HOTSPOT screen? Or do I have to configure it? Remove cookies in hotspot maybe? Any way: Here are my prints.
ip hotspot active print
Flags: R - radius, B - blocked
# USER ADDRESS UPTIME SESSION-TIME-LEFT IDLE-TIMEOUT
0 Bert 10.5.50.237 4h52m2s 4w1d6h35m49s
1 Arjan 10.5.50.252 1h3m15s
tool user-manager router print
Flags: X - disabled
0 subscriber=Arjan name="router1" ip-address=10.5.50.1 shared-secret="123456"
log=auth-ok,auth-fail,acct-ok,acct-fail
radius print
Flags: X - disabled
# SERVICE CALLED-ID DOMAIN ADDRESS SECRET
0 hotspot 127.0.0.1 123456