animagic (5/17/2020)
Make sure that the "Iray Preview Selected" option is NOT selected. If nothing is selected in the scene enabling this option will give a blank result.
LOL. I knew it's gonna be a silly thing. It worked.
I have googled it and found a post in this forum someone having this issue and a comment suggesting uninstalling and reinstalling iClone and Iray plugin, and I almost did that.
Hopefully people are going to be benefiting from this Post in the future.