Get scrip error(recaptcha) if login Dropbox failed first time

[Cross-linking for reference: https://stackoverflow.com/questions/50039275/get-scrip-errorrecaptcha-if-login-dropbox-failed-first-time ]

The Dropbox web site does support IE 11, so if it works there and you've already set the webview to use IE 11, it sounds like there's still some compatibility issue with the webview in particular. Unfortunately we likely won't be able to offer a fix for that, so please update your app to use the system browser itself. (This is already the intended way to use /oauth2/authorize, per the documentation, in order to support the Google Sign In flow in the future, which itself has deprecated webview usage.)