Webhook not accepted by Mailchimp

I can appreciate this feeling like a critical issue, however being a support request I am going to downgrade the priority to Normal.

Can you see if saving the mailchimp settings form (the one with the hash field) helps? If so, this still needs to be fixed but it may be a duplicate of 🐛 Symphony error when navigating to Audiences tab Active .

@aprice42, sure :)

@xenophile, I saved the Global Settings page again, no errors there. Back in the Audience page and trying to enable web hooks gives me the same errors as listed above.

same issue here but for existing webhooks. Worked fine prior to the upgrade from 8.x-1.x

Also doesn't make a difference going to the global settings page and saving again.

I will probably need to revert back to the old version of this module as it worked.

Ahhhhh, now I feel very stupid. I use pantheon.io (that's not the stupid bit) and I set the test enviroment to be password protected so test content isn't on the public web. This of course meant that mailchimp is trying the callback URL and it's failing due to the password challenge. Set the test site to public and it all works fine.

I wonder if it was similar for @menteb?

I have exactly the same problem:

Mailchimp 2.2.2
Drupal 10

In Mailchimp, on this page: https://us2.admin.mailchimp.com/lists/tools/webhooks-edit?id=[xxxxxxx]

There is a field to enter the webhook url from your drupal site. This url is given on the config drupal page at /admin/config/services/mailchimp. The format of the URL is this:

https://YOURDOMAN.com/mailchimp/webhook/[randomCharactorsOfYourWebhookHa...

When attempting to paste and save the webhook URL from my drupal site into that Mailchip page, Mailchimp complains that:

"We couldn't connect to the specified the URL. Please double check and try again."

When I visit the webhook URL in my browser, it returns a page with only a "0" on it. It does not return an error.

The problem with #11 above was a setting on Cloudflare that was blocking the page from wget or curl.

To fix, use curl to attempt to fetch your drupal site's webhook link. You will see the cloudflare error. Then fiddle with cloudflare settings (rules?) to get cloudflare's security features to cooperate.