I can't log in to the Android app at the moment

I was trying to show my colleague how to log into the Android app because she was having troubles.

So i first logged out of the Android app on my phone (which has been working fine for weeks) and explained to her that she just needed to click on the "Sign in with Google" button and bang you are .... not in.

So i tried again. And failed. And so cleared all running apps and tried again. And failed. So rebooted. And failed. So reinstalled and failed. So now i am here asking for help.

More precisely

1. I click the "Login with Google" button
2. I select the correct Google account
3. Quire thinks for a little while
4. Then it shows me the sign up/login in screen again and taunts me with the "Within reach" slide... I'm almost within reach of my tasks... but not quite :-)

I can log in fine on the Web App. Any suggestions?