I had a quick look at Flower Girls yesterday when I saw your post.
Lastly, be sure to sort your mod load order.
I changed the file path, from a random YouTube video I found, and I received another error saying there was no animations installed etc.
If you want to clear the views of animatable properties, simply click on the Broomstick Button: You can re-add the desired properties by selecting the bone or region again if needed.