Minatar doesn't run on cluster because of matplotlib/Tkinter issue

[dapatil211]

This is the error when doing a fresh install with minatar.
ImportError: Cannot load backend 'TkAgg' which requires the 'tk' interactive framework, as 'headless' is currently running

In order to get it working, you need to go into the code of the minatar package and comment out the line that imports the GUI.