magento to constant contact integration issue

[user122953]

Greetings,

When i integrate magento ito constant contact it is giving such connection error,

please check with below screen shot 

https://prnt.sc/gKa6sjzDNyzJ

I did on my dev site and it's working perfectly

but now i am doing in live site but it is not happening in live site

can you please tell me why this is happening

Thank you

[Courtney_E]

Hello user122953,

Thank you for reaching out to Constant Contact API Developer Support. My team is here to assist outside software developers with questions about building into Constant Contact's API.

I'm sorry for the difficulty you’ve encountered regarding connecting the Magento integration. 

This integration does not utilize our public API and is directly supported by our Tier 2 support team.

It looks like you've already spoken with a team member in greater detail regarding this, but if you have any follow up questions or concerns, please reach back out to our support team at 866-289-2101 and reference case #29558520.