I continue to have the API error using constant contact to build a landing page. I was told it was an issue for the web support team for API's I have contacted them, but have had no response. I'm more than a little frustrated with lack of support. I have spoken with the constant contact support team. Apparently this is a known issue.
Thank you for reaching out to Constant Contact API Developer Support. My team is here to assist outside software developers with questions about building their own 3rd party integrations between Constant Contact and other services using Constant Contact’s V3 API.
I'm sorry for any miscommunication regarding the issue that you’re having. While the error you are experiencing when attempting to post to Instagram via Social Share does refer to an API connection, our Social Share tool utilizes Facebook’s API (not ours) for Instagram and Facebook connections.
Due to your ongoing issues with the open defect ticket “'API Permission Denied' error when posting to Instagram”, I have opened a high priority case with our Tier 2 team on your behalf. They should be in contact within one business day.
If you’d prefer to be contacted by them at a specific email address or phone number, (or at a certain time/day), please feel free to our call our support line at 866-289-2101 and reference case #29014195 to let us know!