No login page or control panel

I don't know if anyone has had this problem, but I can't login to my account or see my dashboard. When I click on login, all I get is a blank web page.
This starting happening a couple of days ago. Other than that, everything's been fine except for a few mishaps with the alarm going off after pressing "Away" on my key fob and leaving the house. It turned out to be a low battery on a motion sensor (I think)!