# WhatsApp Flows business-decryption-error - How to Fix 
Author: Prashant Jangid
Author URL: https://www.heltar.com/blogs/author/prashant-jangid
Published: 2025-03-17
Category: Troubleshoot
Category URL: https://www.heltar.com/blogs/category/troubleshoot
Tags: WhatsApp Flows Error
Tag URLs: WhatsApp Flows Error (https://www.heltar.com/blogs/tag/whatsapp-flows-error)
URL: https://www.heltar.com/blogs/whatsapp-flows-business-decryption-error-how-to-fix-cm8d8z2mv008ttbw91yfqee3k

The **business-decryption-error** occurs when the client receives a 421 error code from the business even after refreshing the public key. This issue prevents successful decryption of messages and disrupts WhatsApp Flows.

## What Causes business-decryption-error?

This error typically happens due to:

1. **Outdated or Incorrect Public Key –** The business’s public key may not be correctly refreshed or uploaded.

2. **Key Mismatch Issues –** The encryption key used does not match the expected key for the WhatsApp API.

3. **WhatsApp Server or Business API Issues –** A temporary problem on WhatsApp’s side may affect decryption.


## How to Fix the business-decryption-error

Follow these steps to resolve the issue:

### 1\. Re-upload the Flow's Public Key

- Go to [Meta Business Manager](https://www.heltar.com/blogs/how-to-access-whatsapp-manager-on-meta-business-manager-cm58dt4sr001sx9tqqhi8rmgo) and check if the correct Flow public key is uploaded.

- If not, re-upload the key and ensure it is correctly linked to the associated phone number.


### 2\. Refresh the Public Key and Retry

Refresh the public key by generating a new one if necessary. Retry sending the Flow after updating the key.

### 3\. Verify Key Consistency

Ensure that the encryption and decryption processes use the same key. Confirm that all API requests are correctly formatted.

### 4\. Contact WhatsApp Support

If the issue persists, reach out to [WhatsApp Business Support](https://www.heltar.com/blogs/how-to-raise-a-support-ticket-on-meta-business-in-2025-cm5ezmb8l00em51ztj2uu34mc). Provide details such as error logs, phone number, and API request payloads to expedite troubleshooting.

By following these steps, you can fix the business-decryption-error and restore proper message decryption in WhatsApp Flows. For more troubleshooting tips related to WhatsApp API, check out [heltar.com/blogs](http://heltar.com/blogs).


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