Ipad mini facebook ios 7 problem

Hello!

After upgrading to Ios 7 i downloaded the facebook app to my ipad mini. Once i logged into it, it asked me to log in the facebook from settings in my ipad. I found facebook tab in settings and entered everything but now it tells that the password was wrong. When i'm trying to type the password, it tells me: "error signing in. Could not communicate with the server", and that's it! I tried to delete my account from that settings tab but it doesn't do anything. Even deleting app or rebooting the device still leaves that facebook tab the same: i cannot enter the password and cannot delete an account. Meanwhile each time i start facebook app - it asks me to log in from settings, but i cannot!

What can solve this issue? Because i cannot do anything with that facebook tab - neither enter the password, nor even delete account data from it.

Sorry for long question.

P.S. Anyone know if it is possible to write somewhere about bugs or lags i found in ios7?