When I play Vuforia Mars Model Target Sample, the guide view appears even if I have an error : the variable parent of DefaultTrackableEventHandler has not been assigned.
On the other hand, when I import my own unitypackage created with MTG from .stp, .obj, .fbx, .dae files, I have, in addition to the previous error : Failed to load data set (when playing) and before this, I have JSON Node is NULL just after importing the package. Also, the image representing the model doesn't appear in the inspector nor in the scene and I don't know why I don't have meshes and models of my model
(captures in attachment)
I am using :
Any help please?