Support » Plugin: Contact Form 7 » Constant Contact: ERROR: Failed to establish connection

  • Does this Constant Contact form integration still not work with PHP 7.x – the version WordPress recommends running?

    I’ve followed the instructions found in the docs,

    After creating the app obtaining API key and App secret, and trying to make the connection, I receive this error.

    ERROR: Failed to establish connection. Please double-check your configuration.

    I’ve tried signing into my Constant Contact account first, but it doesn’t matter. The error persists.

    Tried re-creating an APP secret 3 different times, still error persists.

    Tried using different PHP versions – PHP v7.2, v7.3, v7.4.

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