Adding an action to the XRI Default Input Actions causes errors

I’m working from the VR sample project.

I’m trying to detect when the X button is pressed on an oculus touch controller so I have added an action to the XR Left Interaction Action Map in the XRI Default Input Actions. After simply adding the action to an existing Action Map, I get a bunch of errors in the console.

Am I missing an additional step?

Ok I noticed that when I deleted the action, the errors persisted.

But then when I closed the project and re-opened it, the errors were gone.

So I tried adding the action again (errors came back), then closing and re-opening the project.

Now my action works and there are no errors.

Is there some step to reload the actions or something? This seems like pretty bad UX to me!