Beall's List of Potential Predatory Publishers on Weebly shutdown?
I think I found the answer.  There is a lengthy discussion about archived versions of Beall's list on ResearchGate.  It seems that the original list that was archived at https://beallslist.weebly.com/ is in the process of moving to a new website: https://beallslist.net/.

One user on ResearchGate quoted the new web host: "We are in the process of migrating from Weebly to an independent server. Contact form is currently disabled but will be working soon."

So the situation is not dire - they are migrating, not being shutdown. Phew!  It is good that other alternatives exist as well.