I have the same problem when I use my computer at work. But I discovered if I log in then I can reply. When I am home and I see the email I open the email and then click on the link and I guess it automatically logs me in. But.....today's email did not let me click on the link. I had to copy and paste the link and then log in and of course it gives me a totally different view that I do not like using. I do hope it clears up soon.

Reply works for me but the emailed Newsletter doesn't open for me. Today was the first day that happened.