Vray render reflection is black

when i render with vray engine cpu and denoiser vray, the image turns out fine.

but when i render with vray engine rtx and denoiser Nvidia AI, the reflection in the mirror is black

plz help

Your profile shows you have a Radeon GPU, not nVidia. Has that changed? Are you still using SketchUp 2017?

the settings that i am using

Your profile still says you have a Raeon graphics card. If you do,those settings in Vray won’t do you any good.

If you want help, how about actually answering my questions?

Does a GeForce GTX 1650 graphics card support RTX rendering?

Mine doesn’t.

That option will still work - it just won’t be using the RTx cores.
Optix is kinda like a newer version of CUDA.

The different render engines produce different results as they support different features cuda/optix(rtx) support fewer , so it may be that you are using something that isn’t giving you the result you want.find it and Turn it off or use CPU