Jicofo Health Checks - No health checks performed recently

Hi everybody.
My jitsi-meet installation works withouth problems.
The only problem is that I have added org.jitsi.jicofo.health.ENABLE_HEALTH_CHECKS=true in /etc/jitsi/jicofo/sip-communicator.properties but when I try to access to http://localhost:8888/about/health I receive this message:
No health checks performed recently, the last result was PT8765837712991H26M13.188S ago.
Any suggestions?