I created a share room on the evening of 7th Nvember, tested it in a browser and it was working. I emailed the link and no-one could make it work. I have now tried the link again myself and I get the same problem - the page appears but with a constantly spinning "loading" wheel and never actually loads. I know it was set up properly because it worked for a short while.
I have just now set up a second room to test and I'm getting the same problem.