Rule Machine 5 v1.0.5. Missing "Activate Scenes" descriptor under "New Action" > "Adjust Shades/Blinds or Fans". Rule Machine Legacy listed this Action as "Activate Scenes, Adjust Shades or Fans". Appears to be a typo, because after selecting "Adjust Shades/Blinds or Fans" the "Activate Scenes..." sub-actions are present and useable.