I think I have the same problem. Lightroom mobile, v6.40, (Android) does not import the images to the library (I get the message: “25 images have been not imported”). It is also not in the cloud. The last automatic sync was on 19 September. Since then (I take every day some pics) not one image is synced. Also when I do it manually the images are not added to the library. I see the blue circle spinning on the cloud (top right), and when it stops I get the message that the images have not been imported.