Are you having the specific installer in your Chaos Group account, or do you need help with license activation ?
Alternatives if you need V-Ray 3.6 specifically: vray 3.6 for sketchup 2018 google drive
Have you successfully installed Vray 3.6 on SketchUp 2018? Let us know in the comments below (but don't share illegal Drive links!). Draft Guide: V-Ray 3
is a major update that introduced hybrid rendering and deeper integration with SketchUp's workflow, making it a benchmark for photorealistic architectural visualization in that era. Key Features & Performance vray 3.6 for sketchup 2018 google drive