400 error when creating package

Hello team, We have a client who was following the example code from this link: https://www.esignlive.com/blog/esignlive-create-send-package-rest-ruby They used the Package Definition JSON from this link: https://developer.esignlive.com/guides/quick-start/creating-and-sending-a-package-rest/ And they are encountering below error consistently: {"messageKey":"error.validation.createProcess.missingData","message":"Missing process definition.","code":400,"name":"Validation Error"} Please ask if you need more information and share your input. Thanks!