502 Error on Subscriptions Admin Page When Mailchimp for WooCommerce Active

  • Resolved padc

    (@padc)


    8 months, 4 weeks ago

    Hi there,

    After updating WooCommerce Subscriptions from 6.3.2 to 7.5.0, I’m encountering a 502 Bad Gateway error when attempting to access the Subscriptions admin page — but only when the Mailchimp for WooCommerce plugin is active.

    Environment:
    • WooCommerce: 9.8.5
    • Mailchimp for WooCommerce: 5.4
    • WordPress: 6.8.1
    • PHP: 8.3.20 (also tested with 7.4, 8.1, 8.2)
    • Hosting: Shared (Apache, 20i)

    What I’ve Tried:
    • Disabled all plugins except WooCommerce and Subscriptions — page loads fine.
    • Re-enabled plugins one by one — issue returns when Mailchimp for WooCommerce is activated.
    • Switched to Twenty Twenty-One theme — issue persists.
    • Checked server logs — no relevant PHP or Apache errors.
    • Checked WooCommerce > Status > Logs:
    Repeated member.sync.error :: RateLimited and API Request Error messages coming from:
    /wp-content/plugins/mailchimp-for-woocommerce/includes/api/class-mailchimp-api.php

    Notes:
    • This only affects the Subscriptions admin screen.
    • It appears the plugin is failing to handle an API issue gracefully (e.g., rate limits).
    • Ideally, Mailchimp for WooCommerce should not break admin functionality if its API connection is struggling.

    Any help or guidance would be appreciated — especially if there’s a patch, workaround, or upcoming compatibility fix for the newer version of WooCommerce Subscriptions.

    Thanks.

Viewing 3 replies - 1 through 3 (of 3 total)
  • Thread Starter padc

    (@padc)

    8 months, 3 weeks ago

    Just to update… this is due to my web server being blocked by MailChimp/Akamai.

    This is proven by running a cURL test from the server, I am getting a 403 error (AkamaiGHost):

    curl -I "https://us21.api.mailchimp.com/3.0/ping"
    HTTP/2 403 
    server: AkamaiGHost
    mime-version: 1.0
    content-type: text/html
    content-length: 396

    I have requested my server is white listed with MailChimp and contacted my hosting provider. So far, no response.

    It would still be ideal if the issue didn’t kill the Subscription plugin. At the moment I’ve just disabled the plugin altogether and, I guess, we won’t be using MailChimp until it’s fixed. Shame.

    Plugin Support KJ

    (@kjvextras)

    8 months, 3 weeks ago

    Hi @padc

    Thanks for letting us know. Hopefully when your server provider responds you can get this resolved. Once they whitelist, please try and activate the plugin, if you get an error, let us know, provide your url, and enable remote support, we may be able to see errors on our end can provide guidance from there. Hope to hear from you soon.

    Plugin Support khungate

    (@khungate)

    6 months ago

    Hello, we’re going to close out this ticket for now since it’s been a few weeks since we’ve been in touch.

    Please let us know if you still need any help and we’ll be glad to reopen and troubleshoot further. Please note, that the best way to reach us is over at the GitHub plugin page: https://github.com/mailchimp/mc-woocommerce/. From there, you can receive direct responses from the development team, log new issues, download the latest version, and track existing support tickets.

Viewing 3 replies - 1 through 3 (of 3 total)

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