Your Webflow form is likely experiencing two issues: Mailchimp integration is missing or incorrect for the "name" field, and form submission is broken due to action URL/configuration issues.
- Go to your Form Element in the Webflow Designer.
- Select the Form block, then in the Element Settings panel, look under the Form Settings.
- If you're connecting directly to Mailchimp (bypassing Zapier or Make), ensure the Form Action URL is the correct Mailchimp form URL. This should look like:
https://xxxxx.list-manage.com/subscribe/post?u=xxxx&id=xxxx
- If it's missing or incorrect, Mailchimp will reject the submission and throw a generic error like "Oops! Something went wrong..."
- Mailchimp requires specific field names (name attributes) to match its merge tags.
- Click on the Name input field in Webflow.
- In the Element Settings panel, under Name, make sure it matches your merge tag in Mailchimp (usually FNAME for first name).
- The Email input field name should always be set to EMAIL (Mailchimp requires this).
- Do not use spaces or special characters in the field names.
- Publish the site to your live domain or staging site (forms don’t work in Webflow Preview mode).
- Submit the form and check for:
- A successful redirect or success message.
- New subscriber entry in your Mailchimp Audience.
4. Confirm Double Opt‑in and Required Settings in Mailchimp
- In your Mailchimp Audience Settings, check the following:
- The field (e.g., FNAME) is not set to "required" unless you’re collecting it on the form.
- If your form doesn't include a required merge tag field from Mailchimp, the API will reject it.
- Also check if double opt-in is enabled—which means Mailchimp expects the user to complete a follow-up email confirmation.
5. Alternative: Use Zapier or Make Instead
- If you continue having issues with direct POST integration:
- Connect the Webflow form to Zapier or Make (Integromat) for better control over field mapping, validations, and error handling.
- Webflow's native Mailchimp integration only works through form POST, which can be fragile and doesn’t show much error feedback.
Summary
The "Oops!" error usually indicates a form action URL issue or incorrect field name mappings. Check that your Name field uses a name attribute that matches Mailchimp's merge tag (typically FNAME), and that your form is pointing to the correct Mailchimp Form Action URL. Double-check audience field requirements in Mailchimp, and consider using Zapier or Make for more reliable integration.