Ruby Colorize Error Help

To whom it may concern,

I have come to use Ruby because of this following blog: Fixing Invalid EDF Dates - Sleep Data - National Sleep Research Resource - NSRR

However, I have been getting the following error (In the image below) for colorize. I am not sure why and have looked at other forums that suggested that the version of Ruby might be why I have the error.

I currently have Ruby 2.7.4. I had previously owned Ruby 3.0.2. Unfortunately, I still have the same errors/result. Are there any ideas/opinions to how to fix this error?
Thank You!

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