I suspect this is either a bug or an issue with your graphics drivers. In a similar scene on my PC, I can see interpolation dots, points, but no handles. Might have to roll back my driver… again. For the record I’m using a 1070 on nvidia drivers 471.96.
Same here: I can see the dots and the points.
Support have confirmed this is a bug
Maxon changed the GUI completely, maybe that is the problem.
You better contact support.