Campaign failed: Meta error codes explained

Open the campaign report and the Failed tab. The reason next to each contact is Meta's own error. PayPerWA's fee for every failed message goes back to your wallet.

Code	Meta's meaning	What to do
131042	Business eligibility payment issue	Add or fix the payment method on your WhatsApp Business Account.
131026	Message undeliverable	Number not on WhatsApp, blocked you, or not accepting messages. Details.
131047	Re-engagement message	More than 24 hours since the customer's last message. Use a template.
131049	Healthy ecosystem engagement	Meta is limiting marketing messages to this person for now. Nothing to fix; try again later.
131053	Media upload error	The media URL is private, too large, or the wrong format. Check the media limits.
132000	Parameter count mismatch	The template has more or fewer variables than you mapped. Re-map in the campaign.
132001	Template does not exist	The template was deleted or renamed in Meta. Choose an approved one.
131045	Phone number registration error	The number needs to be registered again. Open Settings → WhatsApp and reconnect.
130472	User's number is part of an experiment	Meta's own test group; not caused by you. PayPerWA's fee is refunded; retry in a few days.
#100	Invalid parameter	Usually the business's own number in the audience. Details.

A code not listed here? Raise a ticket with the campaign name. We read Meta's full error for that message.