user-secret set Authentication:Facebook:AppId problem

Hi,

In following this instruction Enabling authentication using external providers using 1.0.0-beta8 I get this error:

user-secret : System.NullReferenceException: Object reference not set to an instance of an object.
At line:1 char:1
+ user-secret set Authentication:Facebook:AppId 217363275301816
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : NotSpecified: (System.NullRefe...e of an object.:String) [], RemoteException
    + FullyQualifiedErrorId : NativeCommandError
 
   at Microsoft.Extensions.SecretManager.CommandOutputProvider..ctor(IRuntimeEnvironment runtimeEnv)
   at Microsoft.Extensions.SecretManager.Program..ctor(IRuntimeEnvir
onment runtimeEnv)

Is there a new version or how can this be fixed?

Thanks!...