Pick Object in Rhino 8 Inside fails C#

Just got Rhino 8 to load in my App but it seem like the OnViewportMouseDown throws an error when trying to select a object.

i can create object all works , just that picking doesnt work

Not sure if this is a bug or something else , or is there another way to select an object ?

Model is correct

All works in Rhino7 …hmmm
thank you

See …