I got my Internet provider to do a complete reset on my internet connection and also turned my modem off for 30 minutes or so while eating supper.
Since doing so I have had 0 issues.
Have you logged out and attempted to log back in?
I have zero issues once it lets me back in... until I log in from a different device (other comp, phone).
Sooo...CORRECTION: just did the test.
Logged out on the comp I'm on and then connected to https://www.huntedcow.com/auth?game=6
It allows me to go to the login screen. I input user info and... ta-dah! Redirects me to www.fallensword.com.
Assuming it will "fix" itself in 20 minutes or so.