Internal Server Error when Editing or Deleting users

Hi There,
Hope youré well. I've got yet another wpmudev plugin that is'nt doing what it's supposed to do and creating problems

With the Mailchimp integration plugin activated on my multinetwork wordpress setup it generates a internal server error when a user tries to modify his profile.
And when an admin deletes a user from the backend, it returns a blank page.
And the user can't be deleted.

Workaround: Do not use this plugin

It looks like there's a syntax error.
Version 1.6