Cellular Private Network Profile not working

The new profile added to manage the cellular private network is not getting installed on the device end - https://developer.apple.com/documentation/devicemanagement/cellularprivatenetwork?changes=_9

When we try to oinstall the profile we get these error messages.

{'Status': 'Error',

'CommandUUID': '556d4936-7514-4121-af8d-3f0bf855a9e6',

'ErrorChain': [

{'ErrorCode': 4001,

'ErrorDomain': 'MCInstallationErrorDomain',

'USEnglishDescription': 'Profile Installation Failed',

'LocalizedDescription': 'Profile Installation Failed'},

{'ErrorCode': 4001,

'ErrorDomain': 'MCInstallationErrorDomain',

'USEnglishDescription': 'Profile Failed to Install',

'LocalizedDescription': 'Profile Failed to Install'},

{'ErrorCode': 1009,

'ErrorDomain': 'MCProfileErrorDomain',

'USEnglishDescription': u'The profile \u201cprivate network policy\u201d could not be installed.',

'LocalizedDescription': u'The profile \u201cprivate network policy\u201d could not be installed.'},

{'ErrorCode': 4001, 'ErrorDomain': 'MCInstallationErrorDomain',

'USEnglishDescription': u'The payload \u201cPrivate Mobile Networks\u201d could not be installed.',

'LocalizedDescription': u'The payload \u201cPrivate Mobile Networks\u201d could not be installed.'}],

'UDID': '00008101-001E1DCA3A81001E'}