We have the Essential Edition and was wondering why some REST API's are working and others are not?

We were informed that all should work.

Here is a sample of a failed one:

curl -X POST "http://opmanager:8060/api/json/device/ConfigureSuppressAlarm?apiKey=XXXXXXXXXXXXXXXX&name=sonar&suppressInterval=3600000"

{"error":{"message":"Internal Server Error while processing this request.","code":5000}}

Thanks