course-github-org-tool uses ruby 2.3.0 at time of writing (April 23, 2017). Various scripts and repos may use other versions. As such it is recommended you install a tool to manage your ruby enviornments. Some such tools worth looking at are:
ncbrown1 recommends https://www.jetbrains.com/ruby/ you are however welcome to experiment with any IDE that works for you.
See here for instructions.
Todo instructions for this…