May i know are you getting this error message on all the images.
What is the format of the images.?
Unexpected end-of-file indicates that there is some error in the file itself, and you most likely will not be able to use the file.
In my case, the problem was actually present in the file on the camera card (meaning probably that the camera card itself was going bad). So the photo file was useless. That doesn't mean that's the cause in your case.
No – it seems to be random. In Library mode I can see a black circle on the small picture – but not in the main screen.
When I go to Development mode the text felt comes up An unexpected end-of-file occurred at the top – and nothing I can do with the picture after that – except go back to Library Mode.
All the files are in NEF- not converted to jpeg.
I have download photos in RAW from two different cameras and cards and the same error appears in all files: "an unexpected end-of-file error occurred".
As I explained earlier in this thread, this is a corrupted file and Lightroom cannot use it. Restore from the camera card or from backups.