WhatsApp Business API: error 131026 message undeliverable and 132001 template does not exist

TL;DR

131026 means the message cannot be delivered: verify the recipient number is correct and active on WhatsApp, that they accepted the latest Terms of Service, and that they run an updated WhatsApp version. 132001 means the template name is wrong for the requested language, or the template is not approved: match the exact spelling in WhatsApp Manager, confirm it is approved (not draft or rejected), and set the language locale correctly. For send pacing, respect the pair rate limit (131056): wait about 6 seconds between messages to the same user.

The error

error 131026 message undeliverable and 132001 template does not exist

Fix

1. 131026 means the message cannot be delivered: verify the recipient number is correct and active on WhatsApp, that they accepted the latest Terms of Service, and that they run an updated WhatsApp version.

Expected: You see the expected output instead of the problem.

1. 132001 means the template name is wrong for the requested language, or the template is not approved: match the exact spelling in WhatsApp Manager, confirm it is approved (not draft or rejected), and set the language locale correctly.

Expected: You see the expected output instead of the problem.

1. Re-run the original operation and confirm the error is gone.

Expected: no error, normal output.

When to use

• You hit this exact error with WhatsApp Business API.
• The symptom matches: error 131026 message undeliverable and 132001 template does not exist.

When NOT to use

• A different error message from WhatsApp Business API; the cause here is specific to this error.
• Unrelated WhatsApp Business API issues (different feature, different failure).
• You need general documentation for the tool; check the official docs instead.

Compatibility

Reported against WhatsApp Business API. Source: https://sanoflow.io/en/blog/whatsapp-business-api-error-codes/.

Variant phrasings

error 131026 message undeliverable and 132001 template does not exist

Why it happens

WhatsApp Business Platform messages fail with error 131026 (message undeliverable) or 132001 (template does not exist).

Edge cases

• If your error message differs even slightly, this is probably a different issue; search the exact text.
• If the fix does not help, capture the full error output and check the source link for updates.

Source

https://sanoflow.io/en/blog/whatsapp-business-api-error-codes/