I have an android app that uses deezer android sdk to login in that service. I never had problem to login using that api, but yesterday after submit login and password in the application it redirect me to a a blank page and not complete the autentication on deezer service.
I already tried to login on app "Deezer SDK Sample" available in developers.deezer.com and it has the same problem.
That was bug on our side for a few hours, this is fixed now.