I downloaded the mindmaker plugin and am having some trouble using it. Has anyone used it with success?
Sure, Im the creator of the plugin and have used it extensively and know others have as well. There is a fairly active Github community in which you could post the issue your having. GitHub - krumiaa/MindMaker: MindMaker UE4 Machine Learning Toolkit
That will likely be the best place for me to respond and others can also chime in.
If your issue is mission critical, I occasionally help out on a consulting basis for custom implementations of Mindmaker. My email is aaron.krumins@gmail.com if you would like to go that route.