I can't login to student finance

Hi there,

I've gone to login to student finance and I won't let me. I press the sign in button and the page appears as normal for a second but then switches to a blank page before I can actually log in.

What's happening? I'm currently in Japan trying to submit my travel grant paperwork but as I say can't log in to do it. Because of this I obviously can't call to get this resolved either.