Hi Timothy,
Can you check to make sure that the StaticResource has a content type of “application/json”? That is required in order for it to appear in the list of available packs to Unpack.
If it does not have a content type of “application/json”, the easiest way to change this is to find the file on your computer, add the “.json” extension to the file name, and then re-upload the file to your StaticResource.
