I don’t have much to add since I’m also experiencing some issues of my own working with the ControllerManager (mostly due to lack of documentation) but i’m pretty sure that example scripts only work with r15, now how you would go about implementing them to r6 i have no idea, due to the aforementioned lack of documentation
The default PrimaryPart for a R6 Character is the Head. For the ControllerManager to work properly, make sure you set the PrimaryPart of the R6 Character to the HumanoidRootPart.