Automations in my system where running without issue. I made a small tweak and am now seeing:
Automation is unavailable
Message malformed: Unable to determine action @ data['action'][0]
on one of the automations. So, I dumped the entirety of my automations.yaml file into https://www.yamllint.com/ and it reported “Valid YAML!”.
What should I try doing to fix this issue?
I would start by undoing it.
I did. In fact, when I tried to use the screen interface to modify the automation (previously, I had edited the .yaml directly), that failed with a similar error message:
Message malformed: Unable to determine action @ data['action'][0]
Figured it out: Someone had suggested that device_id not be used under action. I had removed this line and that is what caused the problem.
You need to replace it with service calls and entity ids instead of device actions. See: