unable to log in

I've been using weekplan last week successfully, but yesterday and today it won't let me log in. I use Firefox 29 and Chrome 35. The log in screen keeps telling "Invalid username/password", but when I proceed to password restore screen and enter email, the app seems to do something, but I never get the email. also, when I try to register again, it doesn't work. when I try to log in using google account, it gives server error.