You will likely be able to open the module in a project in Mx8 first, and then open the project in Mx9. In most cases this will allow the module to work in Mx9 as well.
As for the feedback on the course, the last step of this learning path includes taking a survey, if you leave your feedback there it'll land directly at the academy team, so they can fix this (or at least mention in the learning path that it's for Mx7 or Mx8).