When using the “site address” login flow to connect directly to a self-hosted site account with the site address being an IP address if the credentials are incorrect an unexpected error message is displayed.
Expected behavior
Something like,

Actual behavior

Steps to reproduce the behavior
Follow steps
- Create an account on a self hosted site with or with out Jetpack installed, make sure to set that account as an author and do not connect it to a WordPress.com account via jetpack.
- Use the “site address” login flow to connect directly to that account
from the 11.4 call for testing but use the IP address for the site as the site address.
Tested on iPhone 6, iOS 12.1, WPiOS 11.4