New-Role throws Object reference not set to an instance of an object exception

[bwscheller]

Can successfully execute new-role Role1 --autoassign false inside DNN prompt.
However executing new-role -RoleName Role1 -autoassign $false in Powershell results in:

new-role : Object reference not set to an instance of an object.
At line:1 char:1
+ new-role -RoleName "Role1" -AutoAssign $false
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : NotSpecified: (:) [New-Role], NullReferenceException
    + FullyQualifiedErrorId : System.NullReferenceException,Connect.DNN.Powershell.Commands.Roles.NewRole