I "upgraded" from CS to CC a while ago. Everything was fine until the latest round of updates. It appears Lightroom CC will no longer recognize (and thus not import) raw files from my Nikon D810. I've read the other posts, have updated all of my CC programs, gotten the most recent raw, to no avail--in LR. Everything is fine in Bridge and PS...
Make sure the destination location in Import settings is set correctly and has full read and write permissions.
If that does not help, share the exact error message that you get while importing?