Full Error Message:
Error while creating new document. Error message: Error: 400. Error description: { “error”: { “errors”: [ { “domain”: “global”, “reason”: “badRequest”, “message”: “Export only supports Docs Editors files.” } ], “code”: 400, “message”: “Export only supports Docs Editors files.” } }

App Expert Reply:
You may see this error message if you are trying to use a template format other than google docs (for example word document). The app only supports google doc format templates and can refer back to this article for more detail. Once you have created a google doc file, you can update the template ID within document action and test once again to ensure error is resolved.