I am running Nopcommerce 4.2 with the latest Sendinblue plugin (3.18). I am just using it to push subscriptions up to the email list on Sendinblue.
I put in the correct (v3) of the API key and I receive this error:
Unfortunately, there’s been an error, feel free to reach our support team. Error calling CreateAttribute: {"code":"invalid_parameter","message":"Primary Key for Transactional Attribute already exist"}
Any idea what the issue is?