Generative Fill options disappear

Hi hive mind,

try as i might, including updating photoshop, sign in and out, and resetting preferences, the generative tool doesnt work. 

If i select my image, in my case, a car, and select inverse, the generative tool allows me to type in whatever i want, then shows options creating in properties dialogue box with the spinning circle. 

However, at this point they just disappear like nothing has happened. 

No result, no layer. Its frustrating the .... out of me! 

Anyone find a fix for this?

Btw, my internet is just fine. 

Thanks