And now it is stuck and does not allow me to move from photo to photo. Last night I had to force the application to close.
i am also getting messages that metadata had not been completed. i closed LR and i allowed it to back-up and now i get an error message that 'Lightroom encountered an error when reading a catalog file and needs to quit.'
Since you are a creative cloud subscriber, have you considered just using Photoshop and Camera Raw? That's what I have done. I have found it to be a much cleaner and simpler workflow.