Support » Plugin: WooCommerce - MailerLite » Error on saving consumer key and secret

  • I cannot save the Mailerlite integration page when I enter consumer key and secret. I get the following message: Warning: Cannot modify header information – headers already sent by (output started at /var/www/ in /var/www/ on line 1196

    Also, I cannot retrieve the products in mailerlite when creating a trigger or adding a product in an email.

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  • leannehan


    You found the solution to this yet?
    I’m facing the same problem. After saving it and relogging in, the consumer key and secret code went missing.

    • This reply was modified 4 months ago by leannehan.


    I somehow was able to save the API another time, after creating a new API and delete the old ones. And I had some contact with Mailerlite developers and gave them access, but I don’t think they did anything. The developers would have a look at this issue on their side. After that, I could use the integration and import the products into my automation, but it still did not work in the end 🙁 so still waiting

    I’m having a similar issue – although the key & secret are valid.

    WooCommerce - MailerLite: Invalid consumer key or secret. To use the full MailerLite e-commerce tracking feature, please update and make sure they have read rights.

    Any update from the dev team? Thanks.

    I don’t know why it suddenly worked for me. Even the triggering of a subscriber that bought a specific product did not work at first, but now it does. The dev team had a look at it, but they say they did not change anything. Strange… Just contact them (again).

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