We have a various customers who use Fibaro HC having problems right now. We received various support request, and most of them was related to a bug on parameters in the latest release of their firmware, that is what was told us form users themselves who reach the Fibaro support.
After contact with the Fibaro support they confirm they have some problems with the devices without template: "In FW 4.532 till 4.540 there was a bug that applied for all the devices without template, parameters couldn't be added or changed."
The solution for now told us from users was to reinstall the previous FW on the Home Center 2 (basically to downgrade the HC2), another solution suggested to us from the customers facing this problem was: "I have resolved my problem with new update Beta 4.5xx on my fibaro HC2."
Installing FW 4.541+ should slove this issue too.