Does Not Draw


I finally managed to install the upgrade of Dynamo Studio (V. 1.3).

Unortunately I can not manage to draw anything on the scene, in teh following image I simply opened the sample file Geometry_Curves.dyn and no curves appear on XY plane as it should be.

I did not have any problem with version 1.1 and 1.2

Any idea of what the issue may be?