Nice to meet you. I'm Shuhei Tsuji.
I am using the sample ruby code now, but it does not work well.
So, I read the Readme.md file. However, that link does not work. it's expired. This one.
If you know correct link, share with me.
Please download the code from Visa developer platform-->Project Dashboard --> Sample Code Section. Kindly share the details of the error you are facing along with the API details (endpoint , request, response and x-correlation-id from response header) to email@example.com.
Someone will be able to assist you.