Installed this morning the latest version of Mailchimp (7.x-2.8). Now adding a campaign in Drupal throws an error:
"MailChimp error. The campaign was not saved. MailChimp error code: e, MailChimp error message: e."
The error code may vary, sometimes it states "MailChimp error code: 6" or "MailChimp error code: 7" or MailChimp error code: a"
Strangly enough in MailChimp the campaign is created...
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