ExecJS::RuntimeError on Windows trying to follow rubytutorial

Question

UPDATE: Colin\'s suggestion of removing the line //= require_tree . has fixed the issue.

I have wasted over 2 days trying to follow every suggestion

Answer 1

Quick and dirty solution: remove //= require_tree . from application.js.

As I explain in the comments for the question, this doesn't actually solve the underlying issue that is causing the error, but merely sidesteps it.