"Lightroom has encountered problems reading this photo." error message when access photos on hard dr
I suddenly can no longer edit photos in Lightroom that are stored on my hard drive. I connected my hard drive and when I open the develope module it says "file cannot be opened". When I look at the photos in the library module there is an exclamation mark in the top right corner and when I click on it a message pops up that says "Lightroom has encountered problems reading this photo. You will not be able to make adjustments to the photo". This happened out of the clear blue. I am using Lightroom 6. Thanks for any help.