Some of our laptops stopped using the AI denoiser after upgrade to the latest vray next version. After some research I noticed this in the help section:
Well, I think the best way to handle this is to upgrade the PC, but if you can’t do it just stick to V-Ray NEXT 4.12 and drawback driver version to 4.30 or even 4.19.
Maybe is not the answer that you would expect but this is a present situation.