I have an XPro2 and a GFX and get the error message on both. In the case of the GFX it occurs with the 23mm only, and occurs 100% of the time. In the case of the XPro2 it occurs intermittently with all lenses.
I worked as a newspaper shooter for almost 50 years (Nikon for the first 35 years and then Canon) and can't recall a camera body letting me down.