Model.UpdateCacheSnapshot throw an error in the API call

[ChenChristyYu]

We have an internal app that calls the report schedules on the PowerBI report server. Ever since we upgrade PBRS from May 2019 version to May 2020 version, the API calls have been failing. The path is 'http://reportingpbrs/ReportsPBI/api/v2.0/Reports(path='/Folder A/Report Suite B/Business Team/Report Name')/Model.UpdateCacheSnapshot, and the error we receive saying 'No action was found on the controller 'ReportsController' that matches the request'. When we test the link with GET and POST methods, such as HistorySnapshots, it all succeeded. However, whatever post methods with Model. (such as UpdateCacheSnapshot and UpdateReportDataSets) failed. Has any of you run into the same problem? Could you shed some light?