Paid users have the same problem.
An inelegant workaround: from the SA home page scroll down to see "Articles you've Read". If there are new comments you can click through to the article from there.
Note you'll have to wade through all the articles you've read and not just the ones you are tracking.
I also can't email authors I follow to alert them that they're not getting any new page views today, get this msg "An error has occurred, please try again later" - is the entire site broken?!? Are paid users also having this issue is it just free accounts?