element 3d has encountered an unrecoverable error (AE cc2017)

when i'm using element 3d, as soon as i enable the ray-traced options, it'll show me a pop up error that says : element 3d has encountered an unrecoverable error ...

i'm using AE cc 2017 latest version

Element 3D.2.2.2.2155

and this is my laptop specs :

core i7 3GHz - 4500u

nvidia GT 840m 4gb - intel hd 4400 ( ae is supporting my nvidia gpu cause in gpu info it shows both open GL and cuda informations )

8GB ram

windows 10 64bit latest version - 1TB HDD

all of my drivers are updated to the latest version.

btw i reinstalled element 3d + hotfix patch but didn't solve the problem.

and a couple of minutes ago i enabled AO ray traced again and it didn't show me that error but it ruined some 3d stuff and when i switched to ssao fixed the stuff, and then again i switched to ray and then ruined stuff.

so, how can i fix this error ?

thanks.