We are trying to build an integration into Suitebilling and can link to everything except the billing schedule. The error message we are getting is ("detail": "The billingSchedule record is only available as a beta record. Enable the REST Record Service (Beta) feature in Setup > Company > Enable Features to work with this record.",) I only see these options SuiteTalk (Web Services) SOAP WEB SERVICES and REST WEB SERVICES and both are enabled, is there another option to activate?