PowerBI REST API - dataset refresh history / schedule

[edrury3]

Getting the Refresh History for a Group returns the expected results.

https://docs.microsoft.com/en-us/rest/api/power-bi/datasets/getrefreshhistoryingroup

Attempting to get the Refresh Schedule for a Group does not. It returns (http:200) a blank response ('').

https://docs.microsoft.com/en-us/rest/api/power-bi/datasets/getrefreshscheduleingroup

Has anyone experienced this or can offer any insight?

Thanks. e.