Hi,
Since the upgrade to HA 2020.12, two buttons in Lovelace do not work anymore. It looks like the code expects an entity name to be added, however stopping and restarting HA should not require a specific entity.
The current code and error:
Thanks in advance for your help!
I presume that’s because you’re using an entity-button card, but haven’t provided an entity for it 
It worked already for months like this. I don’t have an entity defined, due to the fact that only a service needs to be called. Do you know how to solve this issue?
Use type: button instead.
