RunReport no longer working after upgrade from 3.31 to 3.4

Using a POST call to

/api/ReportService/Actions/ReportService.RunReport

with a body of

{
    "FilterGroupId":  0,
    "ReportDefId":  57514
}

returns this error

{
    "error": {
        "code": "Base.1.0.GeneralError",
        "message": "A general error has occurred. See ExtendedInfo for more information.",
        "@Message.ExtendedInfo": [
            {
                "MessageId": "CGEN1004",
                "MessageId": "CGEN1004",
                "RelatedProperties": [],
                "Message": "Unable to complete the request because  null  does not exist or is not applicable for the resource URI.",
                "MessageArgs": [
                    null
                ],
                "Severity": "Critical",
                "Resolution": "Check the request resource URI. Refer to the OpenManage Enterprise-Modular User's Guide for more information about resource URI and its properties."
            }
        ]
    }
}

Looked at "/api/ReportService" which came back with

{
    "@odata.context": "/api/$metadata#ReportService.ReportService",
    "@odata.type": "#ReportService.ReportService",
    "@odata.id": "/api/ReportService",
    "Actions": null,
    "ReportDefs@odata.navigationLink": "/api/ReportService/ReportDefs",
    "ReportResults@odata.navigationLink": "/api/ReportService/ReportResults",
    "ResultRows@odata.navigationLink": "/api/ReportService/ResultRows"
}

Are actions no longer supported for reports? Any help would be appreciated.