Analytics360 gives the following error message when I try to connect to MailChimp:
Trouble! MailChimp authentication didn't work! The error message was: I'm sorry, that username/password could not be found.
I can login to MailChimp(.com) with the username and password normally. (I'm guessing the Analytics360 -plugin cannot handle special characters in the password.)
(Google Analytics authentication worked just fine for me)