Title: Error with Constant Contact integration
Last modified: September 9, 2026

---

# Error with Constant Contact integration

 *  [crumblingcalcite](https://wordpress.org/support/users/crumblingcalcite/)
 * (@crumblingcalcite)
 * [1 day, 4 hours ago](https://wordpress.org/support/topic/error-with-constant-contact-integration/)
 * Hi,
 * Back in May we followed the Hustle prompts to upgrade our Constant Contact integration
   to use API v3 with OAuth2. That seemed to go fine and we didn’t receive any errors.
   Under the Integrations page (Hustle > Integrations), Constant Contact appeared
   under Connected Apps.
 * A few weeks ago, I decided to check on things and saw in the submissions (Hustle
   > Email Lists) that starting around the time we upgraded to API v3 new contacts
   were failing to be sent to Constant Contact. It seems like this is the error 
   it kept returning with:
 *     ```wp-block-code
       Info Hustle_Contact_API_V3_Client::throw_error_from_response() Failed to add member - Unable to create contact: list_memberships invalid: 22, list_memberships not found: [22]List name Redacted List Name Here (22)
       ```
   
 * The more recent email submissions (Hustle > Email Lists) under the “Active Integrations”
   column show nothing (while the older submissions starting in May and for a few
   months after still showed Constant Contact, even though they failed to be sent
   to CC). When I go to edit the Hustle sign up form, no integration is listed under“
   Active apps” and “Connected apps” (except for “Local List”). Going to the Integrations
   page (Hustle > Integrations), Constant Contact no longer appears under “Connected
   Apps”.
 * When I try to add it again, (clicking the “+” next to Constant Contact, the popup
   appears pre-populated with the PKCE key and prompts us to go through the authentication
   process again. We’ve tried that and even tried creating a completely new app 
   in Constant Contact (with a new PKCE key) and each attempt fails with the error“
   Authentication failed! Please check your Constant Contact credentials and try
   again.”.
 * I enabled Hustle Debug Mode (Hustle > Settings) and WP debug mode (and I think
   we tried adding Constant Contact again with them active), but I don’t see anything
   in the error logs that seems related to this.
 * We’d love to get Constant Contact set up again. Let me know if there are any 
   other details I can send.
 * Thanks for any help!

Viewing 2 replies - 1 through 2 (of 2 total)

 *  Plugin Support [Nithin – WPMU DEV Support](https://wordpress.org/support/users/wpmudevsupport11/)
 * (@wpmudevsupport11)
 * [18 hours, 2 minutes ago](https://wordpress.org/support/topic/error-with-constant-contact-integration/#post-19016319)
 * Hi [@crumblingcalcite](https://wordpress.org/support/users/crumblingcalcite/),
 * I could notice anomalies regarding this when tested. I’m bringing this further
   to our Hustle teams attention. In the meanwhile, possible to also share the export
   of the popup?
 * Please check the following doc on how to export:
   [https://wpmudev.com/docs/wpmu-dev-plugins/hustle/#module-dashboards](https://wpmudev.com/docs/wpmu-dev-plugins/hustle/#module-dashboards)
 * You can share the export file via Google Drive, Dropbox or any cloud service 
   in the next reply.
 * Looking forward to your response.
 * Kind Regards,
   Nithin
 *  Thread Starter [crumblingcalcite](https://wordpress.org/support/users/crumblingcalcite/)
 * (@crumblingcalcite)
 * [11 hours, 2 minutes ago](https://wordpress.org/support/topic/error-with-constant-contact-integration/#post-19016788)
 * Hi Nithin,
 * Thanks so much for your quick reply.
 * Here’s an export of the 3 different embedded sign up forms: [https://drive.google.com/drive/folders/1LjI6etAfHa7l1HbsUq1U1zbKIb4D421y?usp=sharing](https://drive.google.com/drive/folders/1LjI6etAfHa7l1HbsUq1U1zbKIb4D421y?usp=sharing)
 * Let me know if there’s anything else. Thanks you!

Viewing 2 replies - 1 through 2 (of 2 total)

You must be [logged in](https://login.wordpress.org/?redirect_to=https%3A%2F%2Fwordpress.org%2Fsupport%2Ftopic%2Ferror-with-constant-contact-integration%2F%3Foutput_format%3Dmd&locale=en_US)
to reply to this topic.

 * ![](https://ps.w.org/wordpress-popup/assets/icon-256x256.gif?rev=3446944)
 * [Hustle - Email Marketing, Lead Generation, Optins, Popups](https://wordpress.org/plugins/wordpress-popup/)
 * [Frequently Asked Questions](https://wordpress.org/plugins/wordpress-popup/#faq)
 * [Support Threads](https://wordpress.org/support/plugin/wordpress-popup/)
 * [Active Topics](https://wordpress.org/support/plugin/wordpress-popup/active/)
 * [Unresolved Topics](https://wordpress.org/support/plugin/wordpress-popup/unresolved/)
 * [Reviews](https://wordpress.org/support/plugin/wordpress-popup/reviews/)

 * 2 replies
 * 2 participants
 * Last reply from: [crumblingcalcite](https://wordpress.org/support/users/crumblingcalcite/)
 * Last activity: [11 hours, 2 minutes ago](https://wordpress.org/support/topic/error-with-constant-contact-integration/#post-19016788)
 * Status: not resolved