Shared Albums folder disappeared
In Photos, on my Mac (2.6 GHz Dual-Core Intel Core i5, running Catalina 10.15.6,) my shared albums folder disappeared. It still exists on my phone and ipad, but not in Photos on the Mac or in Icloud photos. Under Shared on the Mac is only a cloud icon with"Activity".
I have multiple duplicate photos libraries on the Mac from efforts to solve another problem (very slow response, now marginally improved).
How can I retrieve my shared albums?
MacBook, OS X 10.11