Access credentials invalid on Windows Machine

[laitcl]

I have followed the read me provided on Windows using git bash. I was unable to run examples/spark; the following is the input line and error message:

$ peg up examples/spark/master.yml

Template validated successfully.

An error occurred (AuthFailure) when calling the RunInstances operation: AWS was not able to validate the provided access credentials

I have attempted to run the exact same setup (copy pasted bashrc and yml files to ubuntu, replaced file path in bashrc), and I was able to make things work. Please provide suggestions for troubleshooting on my Windows setup.

Thank you for your help.