vsti does not sound

This is Cubase 12. As you can see in the video, the MIDI track has sound, but the instrument track has no sound.
It wasn’t an audio connection problem either.

Besides, obviously, I installed seven vsti installations, but a few don’t come out.
Even after initializing Cubase, this is still the case.

I’m going crazy. Seniors please.

I can see no video…

MIDI tracks have no sound. This is not possible.