Despite all my efforts, my IMPORT panel is blank.

I am using LR6.12 on a Windows 10 machine. Plenty of RAM and SSD etc. Despite everything I try, it cannot find images to import... anywhere! If I point to a folder with 5 JPGs in it (like the folder entitles 'claws' above)... and no videos, its blank in the import dialogue box. If I point to a SD Card with just RAWs on it, it cannot see them.
If I clear the 'Don't import suspected duplicates' box.... nothing, no improvement.
I am able to operate, using synchronize which I prefer.
I have reinstalled LR6.0 and then updated again to LR6.12 to no avail. Nothing works.
It seems that import is a constant issue. Can anybody help me work out what's going on here?
Many thanks