I'm a fairly new user of Lightroom. I recently purchased the Sony a7RII and updated LR to version 6.1.1 prior to importing any images from my new camera. LR imports the images without any problems, but once I try to do any edits, LR starts crashing and I have to reopen the software repeatedly. Adobe has gotten many crash reports from me. In addition to that problem, many of my photos are identified as being damaged by LR. Any ideas about what's happening?
Please go to Edit in the top menu bar choose preferences> then go to performance tab. And uncheck use gpu processor click on ok on the preferences window.
Restart the Lightroom and try again.
If you are using Mac the same option will be available under Lightroom which is just next to the apple icon on the top left corner.