Why can't Cubase work with MIDI keyboards on the fly?

Novation Impulse.

Works perfectly with Ableton. Record button, play button, forward/backwards button. Just works. On the fly.

None of these work except for the keyboard when I try with Cubase 10. Cubase TEN. It’s TEN. PRO.
Cubase doesn’t recognize what the record button is.

Why? How? How is it that Cubase 10 PRO can’t read a simple MIDI keyboard in 2019?

What happened?

You try this?

https://youtu.be/voR0Kgsmx_0