iPad Twitter app can't sign in/authenticate?


I just got a new iPad mini and downloaded the Twitter app, but I am not able to sign in because it can’t authenticate it.

I’ve deleted and re-downlaoded the app several times.
I’ve gone into my main Twitter account to ensure that I don’t need any sort of authorisation to log in.
I’ve also made sure that the Twitter app has permission.

What can I do to allow my log in with my iPad Twitter app?