Comment 2 for bug 1394661

I am not able to reproduce the issue with my account.

I specifically removed the Ubuntu app from Facebook > Settings > Apps
I re-created a Facebook account from my Ubuntu Phone, running image #167 (ubuntu-touch/ubuntu-rtm/devel-proposed)
I was able to enter account creds, approve the various permissions requested by Ubuntu for Facebook, and finish the account creation process, to the log into the webapp.

I suspect you have an account with special security settings which may affect the end of the process. I tried to keep my security settings with most FB defaults, although I tend generally not to allow that much access and sharing either.