Does it work with WP 4.0? Doesn't seem to.

I installed this plugin and set the API key but that’s as far as I can go.

When I attempt to a group using a URL like ( http://www.meetup.com/some-meetup-group/ ) I get conflicting messages. Ex: “Groups have been added.” and “Please enter a correct group urlname.” And the groups list says “No groups have been added yet”.

Some assistance would be welcome.

EDIT: Found the answer: http://wordpress.org/support/topic/group-url-not-submitting?replies=7#post-6014249