I get the error Power type "origins:creative_flight" is not defined when I try using the creative_flight power. I'm using Origins mod 1.16.5-0.7.3

My power file is pretty basic:

{
    "type": "origins:creative_flight",
	"name": "Floot",
	"description": "Hey man, you can fly."
}

It was added in 1.0.0 (the 1.17 update). In the wiki, I suggest switching your version to 0.7.3 in the bottom right dropdown. That way you won't see features added in 1.0.0.