Error: "Must define policy action for action-group"
Cause
You referenced an action group using the action-group keyword, but you have not defined that policy action group.
You will trigger this command if you use a command like this:
set policy qos name <policy-name> shaper class <class-id> match <rule-name> action-group <action-group-name>without a corresponding command like this:
set policy action name <action-group-name> ...Remedy
Either define the policy action group, or delete the reference to the action group.