Nat64 unknown error

Microsoft.Windows.RemoteAccess.2012.R2.Monitor.DA_NAT64_HEURISTIC_UNKNOWN (UnitMonitor)

An unknown error occured with Nat64

Element properties:

TargetMicrosoft.Windows.RemoteAccess.2012.R2.Class.NAT64
Parent MonitorSystem.Health.AvailabilityState
CategoryCustom
EnabledTrue
Alert GenerateTrue
Alert SeverityError
Alert PriorityNormal
Alert Auto ResolveTrue
Monitor TypeMicrosoft.Windows.RemoteAccess.2012.R2.Monitor.HeuristicMonitorType
RemotableTrue
AccessibilityPublic
Alert Message
Nat64 unknown error

Error Description - {0}
Error Cause - {1}
Error Resolution - {2}
RunAsDefault

Source Code:

<UnitMonitor ID="Microsoft.Windows.RemoteAccess.2012.R2.Monitor.DA_NAT64_HEURISTIC_UNKNOWN" Accessibility="Public" Enabled="true" Target="Microsoft.Windows.RemoteAccess.2012.R2.Class.NAT64" ParentMonitorID="Health!System.Health.AvailabilityState" Remotable="true" Priority="Normal" TypeID="Microsoft.Windows.RemoteAccess.2012.R2.Monitor.HeuristicMonitorType" ConfirmDelivery="true">
<Category>Custom</Category>
<AlertSettings AlertMessage="Microsoft.Windows.RemoteAccess.2012.R2.Monitor.DA_NAT64_HEURISTIC_UNKNOWN_AlertMessageResourceID">
<AlertOnState>Error</AlertOnState>
<AutoResolve>true</AutoResolve>
<AlertPriority>Normal</AlertPriority>
<AlertSeverity>Error</AlertSeverity>
<AlertParameters>
<AlertParameter1>$Data/Context/DataItem/Property[@Name='ErrorDesc']$</AlertParameter1>
<AlertParameter2>$Data/Context/DataItem/Property[@Name='ErrorCause']$</AlertParameter2>
<AlertParameter3>$Data/Context/DataItem/Property[@Name='ErrorResolution']$</AlertParameter3>
</AlertParameters>
</AlertSettings>
<OperationalStates>
<OperationalState ID="UIGeneratedOpStateId316c1f57d237476bbc8a35ff3f1826cf" MonitorTypeStateID="Error" HealthState="Error"/>
<OperationalState ID="UIGeneratedOpStateId9a122bc2fd024dd0ad614ac0de7d8fcd" MonitorTypeStateID="Warning" HealthState="Warning"/>
<OperationalState ID="UIGeneratedOpStateIdbad3b418bde442ee8ac4e8b0b70d3e84" MonitorTypeStateID="Healthy" HealthState="Success"/>
</OperationalStates>
<Configuration>
<Interval>300</Interval>
<SyncTime/>
<ComponentName>Nat64</ComponentName>
<HeuristicId>2147942400</HeuristicId>
</Configuration>
</UnitMonitor>