Facebook Login iOS "Uncaught TypeError: Cannot read property 'isCancelled' of null"

[liamcharmer]

When I login with the facebook, I have an account that is involved with the Developer App, and it works fine. However when I log in with an account not associated with it on iOS. It crashes and has the following error:

NativeScript encountered a fatal error: Uncaught TypeError: Cannot read property 'isCancelled' of null

I have done this with facebook on Android and i get the error:

Login Error: There is an error in logging you into this application. Please try again later

On android this is a facebook page error, and it doesn't crash the app.

This made me look at the developer platform, however it doesn't identify any errors in the login side of things. Just wondered if i can get more guidance of maybe an error here or something to do with isCancelled on this?