Installation under Studio one does not work

Good day

I downloaded the trial version and tried to run it as a vst under Studio 5.1 Artist for over two hours. So far without success.

I have proceeded as follows.

Interface Steinberg UR22 C spzifiziert as audio device.
Audio track created, Input R, Git
Guitar midi vst on the track.

Then isrument track created. e.g. Presence or a drum Vst.

The guitar is recognized at the input of the audio track, but obviously not at Guitar midi, because nothing moves there.

What am I doing wrong, I would like to test the app and buy it if I like it.

LG Sandra

Hope this helps.