Rpg Maker Developers Group

I have noticed that I keep getting an error when I try to use the plugin for Moghunter's Theatrhythm mini game. If I completely miss the input or hit the correct input on time it works fine, but if I am even a little late hitting the button the game freezes and the error message
TypeError Cannot read property 'position' of null

I tried turning off all of my other plugins off to see if that would help, but I still keep getting the error. I also tried to re-downloading a more up to date version plugin (I was seeing the same error with version 1.4 and I tried 1.5). I also tried deleting my save files and starting a new game, but that didn't help ether.

Here is what it looks like when I open the dev tools:

Protected download

I'm am still learning the basics of Javascript and this is my first project on rpg maker mv, so I would appreciate all the help I can get.