Nikon Z8 files will not upload into LR Classic

I Updated LR, and the Mac OS (15.6) in the last few days

optimized my catalog,

restarted my computer and ran disc utilites.

nothing works..

this has been an ongoing issue, occasionally i have been able to upload images. last time someone told me to try an older version of LR and i got a bunch of images to upload, then updated my OS and and LR thinking it would all work with everything updated. No go. From the chat it told me to trun off the CPU thing, that did not help either. I am totally frustrated, the Z8 has been out for a couple of years, this should be solved by now. I did send crash reports the last time this happened, did not see any results from that. 

thanks