I think you may have mixed up “Neutral” and “Safety Ground”. Your system has a Neutral, however as in newer systems it is possible the Neutral isn’t in the box you wish to put the dimmer in (this would be the case of a switch wired to a light where power enters at the light.
In any case it is likely the wire can be changed to provide a neutral where you want the Inovelli.
Can you post a quick sketch of you current wiring?
See: this post wiring