Form signups fail with Failed to add user 400 error
Subscriptions fail with a Failed to add user or Can't add user error even though the API connection appears set up.
Tier I · Proven The best-established problems.
5 public reports · first reported 19 July 2016 · last reported 29 October 2024
What's going wrong
Site owners using this WordPress plugin to connect opt-in forms to Campaign Monitor or Mailchimp report that signups stop reaching their list.
AI-assisted: written with the help of AI from the reports. The idea report has the full summary.
In the idea report
- The full summary.
- The products the 5 reports are about, and how many came each month.
- Related problems.
No business has been found with this problem yet, so the report has no contacts. All sales are final — no refunds. Pricing.