From time to time the mailchimp action "mailchimp.visitor_subscribe_to_list" fails. The details on the failed action do not give any hint (at least to me) where the problem lies:
If I copy/paste the Mailchimp API key after a failed action happened, the Mailchimp connector starts to work properly and actions are successful again. However, only for approx. half a day.
I checked everything else (like subscriber hash, list id etc.). That seems to be correct. I wonder whether the problem lies within Tealium or Mailchimp.
Did anyone have a similar problem? Any hints are highly welcomed!