Using makeAlpha of 0.66 generates the Unsupport this animation type!
(btw, Unsupport is not word ... Do not support this animation type! is better)
Reverting back to 0.65 fixed the issue by using the following in the Podfile
pod 'Stellar', :git => 'https://github.com/AugustRush/Stellar', :commit => '5249167900b1eb136ce71543af7817a9fa5535cb'