cat stepped on laptop and online I found 1 answer where the files could not be read and the answer was a setting but I don't understand what setting
Please make sure you have Read and write permission on the folder where you are trying to import the images in Lightroom.
Also try to change the location of import and then try,
Make sure to update Lightroom to the latest version 2015.6.1/6.6.1.
Retrieving data ...