I have Lightroom and have been using it successfully for about 9 months with my Nikon D800
I recently bought a Nikon D500 as a back up body.
When trying to upload my first pictures on the D500, Lightroom would not read them. I looked for and found an update to the software. After updating, Lightroom read and uploaded the pictures from the D500.
Now, Lightroom will not read or upload new pictures taken on the original D800!
I have looked for new updates to the Lightroom software but am told that my sorter is up to date.