Excel Add-in Can't connect to the service: Server Authentication failed

This error comes from the Aqilla MS Excel Add-in.

It indicates an incorrect login / password combination for the instance you are trying to connect to. Try again.

Make sure that Caps Lock is off. The pasword is case sensitive.

If you still have a problem, check your login and password are correct by logging on to Aqilla itself (for the instance in question).