I have a problem with the model target prefab of my object.
I have a .fbx of sunglasses and use it on the model target generator. I then import the unity package (and it says "Json node is null"). I configure vuforia with the licence and all but when i create the modelTarget, the model is not in the editor or default preview. Moreover, in the associate file (in models) there is an empty prefab and an empty file meshes.
I don't understand why the model is not created.