Fix-it guides · WhatsApp Business API
Something not working on WhatsApp? Find the fix here.
Clear, step-by-step answers to the problems businesses hit most on the WhatsApp Business API — with the exact error codes and what to do about each one.
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Common WhatsApp problems
WhatsApp message not delivered
Undeliverable messages, Meta delivery decisions, experiments and the 24-hour window.
Read the guide →WhatsApp Business account blocked or limited
Policy blocks, locked accounts, spam limits and a red quality rating.
Read the guide →WhatsApp template errors
Missing templates, variable mismatches, paused and disabled templates.
Read the guide →Number registration errors
PIN problems, re-verification, numbers not registered and display names.
Read the guide →Move a WhatsApp Business App number to the API
What happens to a number already on the app, and the two ways to connect it.
Read the guide →WhatsApp calls not working
Missing call controls, calls that don't ring and call permission.
Read the guide →All 65 WhatsApp API error codes
Every code with what it means, why it happens and how to fix it.
Read the guide →Understand the rules
Background reading
The 24-hour window
When you can reply freely and when you need a template.
Learn more →Messaging limits & quality rating
The daily tiers and the green / yellow / red rating.
Learn more →Why templates get rejected
The common reasons and how to fix them.
Learn more →WhatsApp glossary
WABA, BSP, opt-in, quality rating and 30+ other terms explained.
Learn more →Still stuck?
Lead Pattern customers can raise a support ticket from inside the app, or message our team on WhatsApp. The Help Center has a full article for every error code.
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