I added the MailChimp actions from the Nintex® Store.
I created an API key on mailchimp, and tested this on Postman.
I used the same key in the MailChimp Create campaign and MailChimp Send Campaign.
The workflow then suspended with the error Invalid MailChimp API key: XXXXXXXXX.
Although the key contained -us14 (the datacenter) at the end, the error doesn't show this -us14. It seems to ignore the - and everything behind it. (tested that out)
I also created other MailChimp API keys to test, they all give the same error.
Any ideas on how to use MailChimp using the Nintex store App?