We have Published A roku channel.
In channel we have created monthly subscription in-app products.
We want to cancel and refund the money to the ROKU Customer if he Cancels the Subscription from channel side.
We are using WEB API provided by Roku at https://sdkdocs.roku.com/display/sdkdoc/Web+Service+API
The Api Response we are getting after calling Cancel and refund
"errorMessage": "Object reference not set to an instance of an object.",
Please help with this