Apparently there isn't enough red in that eye for Lightroom to detect the color to correct. On my monitor, I'm able to see more red in the other eye, but I see very little (if any) in the one that you have chosen to fix. But then, maybe I'm colorblind.
Thanks for a swift answer!
You are correct in your assumption, though that is not my concern.
I did the right eye, it was easy and no hassle.
I cannot do the left eye though.
The attached images are in the wrong order.
The top image is the error message I get.
The bottom image shows the right eye (Which I did prior to the operation, and the left eye which is encircled)
I don't know. The crosshair on the left eye is not centered on the area containing the red. That would be my only observation. Having dealt with a lot of redeye.
Drag the red-eye adjustment on the right eye and position it over the left eye. Then drag the size of the circle so that the grey inner spot just covers the red-eye. When you have the left eye as you like it, then add red-eye adjustment to the right eye again.