Somewhere somehow the permissions has changed on the drive and folder you have selected as the Destination to copy the Fuji RAF files to in the Import dialog window. Or you have selected a drive and folder that is different than the one you used previously, when you could import Fuji RAF files, which your Username does not have Read & Write permissions.
Check the Destination folder for proper Read/Write permissions for your Username.
In all honesty with Mac OS X this can happen all by itself, or so it seems in my short 2.5 years of using a Mac and OS X.
What error message do you get if any? What does it say exactly, post a screen capture if possible. Most likely its what jeroenz says above.
Let me add that recently Apple came out with another update to El Capitan which seems to change permissions. Could you of recently install this new El Capitan update?
Yes that is exactly what happened! My Lightroom folder is located on Google Drive so it must have changed something.
I changed the permissions and the location manually now and i could import the files .
Thanks a ton for the immediate responses! I didn't update to El Capitan yet but I guess in that case I will wait a little longer...