iCloud photos say on, but it is not
I want to sync photos from my Photos application on my Mac to my iPhone as I have done many times in the past. But this time it says "iCloud Photos is On", yet it is not on. That message won't go away, and I cannot sync to my Mac photos. I turned off iCloud entirely, but still says the same thing. Restarted Mac, the sync photos options came on for a few seconds, but quickly reverted to "iCloud Photos is On".
Photos version 3.0. Mac OS 10.13.6 iTunes version 12.8.0.150
Any advice? Thank you.
Safari-OTHER, Mac OS X (10.7.4)