Hello, yes I'm certain the above title sounds confusing, but today I had edited a RAW file in Lightoom Classic 11.1, finished the editing and took a short break from the Mac. When I returned in perhaps 20 minutes there was a flag on the photo, 'This File Could Not be Found', and I was unable to export the edited photo to the desktop. The Develop screen was greyed out and I had no controls either for more editing nor ability to export it.
I wouldn't think LRclassic has a time limit for editing, but I'd not run into this issue before so would like to know how to avoid this issue.
Is the original file on an external drive? If so, during your 20 minute break, that drive may have gone to sleep or otherwise become unavailable. If LrC can't see the original file, it'll show as unavailable and Develop & export won't work.