I love iClone 6, but... no mirrors.

There is some sort of problem stopping the iClone 5 mirror prop from working in 6.  I don't recall anyone solving that yet.

Reflections always have been, and continue to be an issue in iClone.

Water works great, but other reflections don't.  I documented it here:  https://www.youtube.com/watch?v=0rvJ_PGhZVw

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iClone 7... Character Creator... Substance Designer/Painter... Blender... Audacity...
Desktop (homebuilt) - Windows 10, Ryzen 9 3900x CPU, GTX 1080 GPU (8GB), 32GB RAM, Asus X570 Pro motherboard, 2TB SSD, terabytes of disk space, dual  monitors.
Laptop - Windows 10, MSI GS63VR STEALTH-252, 16GB RAM, GTX 1060 (6GB), 256GB SSD and 1TB HDD

Can someone please help ? I purchased some mirror props for use in Iclone 5 and they work just fine there. However, I cannot get these same props to work in Iclone 6 - I am frustrated that I cannot solve this problem ! Is there anyone out there who knows of a solution - If so could you please throw some light and give some step by step instructions as to how to get mirrors to work in general ?
Thank you
Bill V