I was using the lightroom app yesterday and suddenly it stopped working and I could not get back in. It asked me to sign in and I could not sign in. Now when I open the app all I get is the sign in screen where it says 'Sign Up' and to the right 'Sign In'. But when I tap each one nothing happens. My desktop app on my imac works fine. I need to get the pictures I took in the app and I don't know what to do. I am all up to date on all updates.