Sorry for the delayed reply.
What version of Unity and Nuitrack do you have? And which sensor are you using?
Do the examples run from the Nuitrack/nuitrack/nuitrack/bin folder?
And please attach Unity log (you can find it in the folder: C:\Users\username\AppData\Local\Unity\Editor\Editor.log)
Looking forward to your response.
TerminateException: NuitrackException (TerminateException)
nuitrack.NativeImporter.throwException (nuitrack.NativeImporter+ExceptionType type) (at :0)
nuitrack.NativeNuitrack.Init (System.String config) (at :0)
nuitrack.Nuitrack.Init (System.String config, nuitrack.Nuitrack+NuitrackMode mode) (at :0)
NuitrackManager.NuitrackInit () (at Assets/NuitrackSDK/Nuitrack/Scripts/NuitrackManager.cs:221)
NuitrackManager.Awake () (at Assets/NuitrackSDK/Nuitrack/Scripts/NuitrackManager.cs:119)