whenever I try to use the power "extraorigins:nimble" it says that it is unrecognized and if I try to use it as a power type, it says it needs to be defined.

I'm getting the same issue with "extraorigins:bigger_head" and "extraorigins:small_arms"

Which powers are these? Powers you made? How did you made them? What did you do?
I'm managing to make new powers with a good rate of success.

These powers are used in the same way as vanilla Origins powers