SlicerIGT U37 Neuronav Error

IM trying to follow the tutorial from Neuronav ppt but i run into this error -

[VTK] Warning: In vtkMRMLMarkupsFiducialNode.h, line 113

[VTK] vtkMRMLMarkupsFiducialNode (0000029120E822D0): vtkMRMLMarkupsFiducialNode::AddFiducialFromArray method is deprecated, please use AddControlPoint instead, Im using slicer 5.8.1 , i understand that this tutorial is old but how to go abbout further?

Thanking in advance.

This seems like it’s just a warning and it should allow you to follow the tutorial if you ignore this. Do you have any other error?