Troubleshooting Tip : 'Failed to add FortiSASE service' error in FortiManager

To check the details of the error using the commands below in FortiManager:

diagnose debug application dmsase 255
diagnose debug enable

Error display showing unsupported device os type:

Response [unknown]:
{ "id": 224, "result": [{ "status": { "code": -20024, "message": "Unsupported device os type"}, "url": "dvm\/cmd\/add\/device"}]}

Advanced NFR license with S/N FEMSAN is currently not supported in FortiManager v7.4.6 and will be included in the upcoming v7.6.4.