I have had this plugin working on this site for a very long time. I noticed today (maybe it's from the recent update) that when I visit the site the home page doesn't load entirely. Whenever this has happened before it was usually the Membership plugin being installed on a site where I wasn't using it. So I enable it and set up a guest user with full access. Problem solved.
Sure enough, in this case when I logged in, the site loads entirely. I can see that I am logged in to membership from the indicator on the top right, however I went to my dashboard and the membership option on the left hand column is gone. Completely gone.