Troubleshoot WhatsApp Cloud API delivery failures.
Top Meta error codes explained
131026 (Message Undeliverable): Recipient phone number is not registered on WhatsApp or has opted out. Verify international country code formatting.
131047 (Re-engagement Window Expired): More than 24 hours have passed since the customer’s last message. You must send an approved template to re-open the window.
130429 (Rate Limit Exceeded): You have exceeded your 24-hour tier limit or sent too many messages in a short burst. Pacing queues will resume automatically.
132001 (Template Param Count Mismatch): The number of variable parameters passed does not match the approved template specification.
100 (Invalid Access Token): Your Meta System User access token has expired or been revoked. Generate a permanent token in Meta Business Settings.
