Twilio API errors block sending with no explanation
Test and bulk SMS fail with Twilio API errors such as HTTP 400, 401 and 52182 that the plugin does not explain.
Tier II · Emerging Problems that are still building up.
3 public reports · first reported 25 August 2021 · last reported 28 July 2025
What's going wrong
Site owners connecting this WordPress SMS plugin to Twilio report that test messages and bulk sends fail with raw API responses, including HTTP 400, HTTP 401 authentication failures and a messaging service not specified error.
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 3 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.