Hello AestheticaLA,
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.
Based on the pop-up form on your website, it looks like you may have already resolved this issue, but for visibility on the forum, here is the information:
To provide improved security, Constant Contact's V3 API is now using a new authorization management service, and has ended support for the previous service/keys as of March 31, 2022, with the service officially ending as of September 7th, 2022.
If the issue is occurring with a 3rd Party WordPress plugin to connect with Constant Contact, you can check for updates in WordPress, contact the developer of the integration/plugin directly to see if/when the updated version will be available, and/or let us know which WordPress plugins/forms that you use so that we can better assist. (Common plugins we see being used by customers are “Gravity Forms” and “Contact Form 7”.)
You will need to copy the key (or create a new one), update the plugin in WordPress, and then connect the updated key to the updated plugin in order to ensure the continued functionality of the form.
*If you are not sure who the developer is or how to contact them, please let us know the name of the 3rd party plugin/integration/form that you are using and any additional relevant information so that we can try to provide further direction.
Please have a look and let us know if you have any other questions!
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