error CS1704: An assembly with the same name Vuforia.UnityExtensions.Editor' has already been imported. Consider removing one of the references or sign the assembly
Vuforia.UnityExtensions' has already been imported. Consider removing one of the references or sign the assembly
F:/unity-2018.1/Unity/Editor/Data/PlaybackEngines/VuforiaSupport/Managed/Editor/Vuforia.UnityExtensions.Editor.dll (Location of the symbol related to previous error)
Assets/Vuforia/Editor/Scripts/Vuforia.UnityExtensions.Editor.dll (Location of the symbol related to previous error)
error CS1704: An assembly with the same name
F:/unity-2018.1/Unity/Editor/Data/PlaybackEngines/VuforiaSupport/Managed/Runtime/Vuforia.UnityExtensions.dll (Location of the symbol related to previous error)
Assets/Vuforia/Scripts/Internal/Vuforia.UnityExtensions.dll (Location of the symbol related to previous error)
Compilation failed: 2 error(s), 0 warnings