AttributeError: type object 'LayerStyle' has no attribute '_classses'

When running lottie_convert.py on a file, I encountered an issue where some code seems to have some spelling mistakes.

I encountered the error AttributeError: type object 'LayerStyle' has no attribute '_classses'

Looking at lib/lottie/objects/style.py there seem to by multiple instances of trying to access LayerStyle._classses (as opposed to LayerStyle._classes, notice one of these has an extra s in the middle).