Cisco ISE Counter for Authenticated Guests does not count up

[Marco Serato]

Hello community
We have built a Cisco ISE guest portal (sponsored portal) with login. In addition a Cisco WLC, which redirects the guests to the Cisco ISE portal. The authentication of the guests works without any problems. Unfortunately, the Authenticated Guest Counter remains at 0 and simply does not count up.
Does anyone have any idea what might be missing or not configured?

Many thanks

[Marco Serato]

Nothing can be seen today in the live log for the last 24 hours for the WLC and Failed Auth & Session.

In the Report -> Endpoint & Users -> RADIUS Accounting you can see that 3 weeks ago there was still data for Accounting Start, Stop & Interim Update. But that was 3 weeks ago. No current data.

Can an accounting be triggered on the WLC via CLI?

[MHM Cisco World]

get it, WLC is not send account anymore I think 
check if FW block ports 
what is WLC platform you have ?

MHM

[Arne Bier]

You can’t trigger accounting. You can trigger a test aaa authentication but that does not involve accounting. You need an active session to cause accounting to work.

Have you tried running a monitor capture session on the outgoing interface on the WLC?

Please share output of
show run | section radius
show run | include aaa

Details are important. What IOS-XE version? Maybe there is a bug?