I have a screen shot but I can not seem to upload images to this forum.
On the MailChimp WD page step 1/3, after pasting the API key created at the link “https://admin.mailchimp.com/account/api ” and logged into my mail chimp account
A message up the top says
“It looks like you need to re-validate your MailChimp API key before you can continue.”
and in red below the API input box it says
“We received an unexpected error: null”