Maybe this thread can help you: Homematic binding doesn't find any things (Java Exception)
As an addition to the thread, this is how I configured the CCU firewall:
With these settings everything works fine with 2.27.8 in my environment.
Maybe this thread can help you: Homematic binding doesn't find any things (Java Exception)
As an addition to the thread, this is how I configured the CCU firewall:
With these settings everything works fine with 2.27.8 in my environment.