I had quite a few kits in my Dropbox Public folder. Dropbox has discontinued its use of Public folders. The correspondence I had with dropbox indicated that links would still work, but unfortunately that has not proven to be the case. I moved the kits to my “non-public” folder and tried to relink, and I still got a missing kit error. Kits I posted recently that were never in the Public folder were not affected, nor were kits I posted before I began to use the Public folder to store kits.
To remedy this, I have deleted the affected kits, and I will repost them over the next few days. By my count there are 22 affected kits or packages of kits. Sorry for the inconvenience.