Animation mixer on page 12.1 doesn't work with a-frame version provided

[patrikniebur]

Glitch remix provided on page 12.1 includes a-frame v 0.5.0 which doesn't work with animation-mixer component. Including gltf model works fine but on page 12.2 when including animation mixer component it doesn't do anything.

I wasn't able to find reason why it won't work and it's especially confusing when you compare it to a solution file where it works perfectly fine, however this includes different version of a-frame then exercise file.

Exercise file
Solution file
a-frame school lesson

Edit: Related to issue#11

I would be happy to help with this but I'm not sure how.
Thanks