It works just fine for me. I'm not sure what to say to help you.
Here are some thoughts:
1) Have you created a brand new empty scene and added an XRef object? This is to start simple and try to find out what works and what doesn't.
2) If #1 above works, merge everything into this new file. Leave the working XRef object. Render and see if it works.
3) What are your machine specs?
4) What if you detach the glass so it's a separate object and assign simple, basic glass? Does it work?
5) What if you do and ENU reset and also uninstall V-Ray, reboot, and reinstall it. That only takes a few minutes.
I'm just trying some trouble shooting things.
I attached a render of your file with an XRef Teapot behind your glass and it worked fine.
Rob Holmes
------------------------------------------------------------------------------------------------------------------------------------------
3ds Max (2023-2025), V-Ray 6.2, Ryzen 9 3950-X Processor, DDR 4 128MB, Gigabyte Aorus X570 Master motherboard, Sabrent Rocket NVMe 4.0 M.2 drives, NVidia RTX 4090, Space Pilot Pro, Windows 11 Pro x64, Tri-Monitor, Cintiq 13HD, Windows 11 x64
------------------------------------------------------------------------------------------------------------------------------------------