Running start.rb results in an error

[BlareRobinson]

Running start.rb after cloning the project, results in a ruby error.

OS Version- 10.13.3 (17D47)

ruby 2.3.3p222 (2016-11-21 revision 56859) [universal.x86_64-darwin17]

...

Blares-MacBook-Air:~ blare_robinson$ git clone https://github.com/realkdaigle/hello-treehouse.git
Cloning into 'hello-treehouse'...
remote: Counting objects: 12, done.
remote: Total 12 (delta 0), reused 0 (delta 0), pack-reused 12
Unpacking objects: 100% (12/12), done.
Blares-MacBook-Air:~ blare_robinson$ cd hello-treehouse/
Blares-MacBook-Air:hello-treehouse blare_robinson$ ruby start.rb
Starting...
start.rb:5:in `

': Don't start! It will explode! (RuntimeError)