WhatsApp API Error 2066, "Invalid Flow Mode," occurs when you attempt to send a flow that is in DRAFT state without specifying draft mode, or when you send a PUBLISHED flow while incorrectly using draft mode. This misconfiguration prevents your automation from running correctly.

Possible Causes of Error 2066

  1. Flow in Draft Mode Without Specification – If a flow is still in draft status, it must be explicitly sent using draft mode.

  2. Published Flow Sent in Draft Mode – Once a flow is published, it should not be sent using draft mode.

  3. Incorrect API Request Parameters – Your API request might be incorrectly formatted, leading to mode-related errors.

  4. Flow Status Not Updated – The flow may have been recently modified but not properly updated before sending.

How to Fix WhatsApp API Error 2066

1. Check the Flow Status

Verify whether the flow is in DRAFT or PUBLISHED state and ensure that the correct mode is used when sending the flow.

2. Use Draft Mode for Draft Flows

If the flow is still in draft, make sure your API request includes the correct draft mode parameter. Example: "mode": "draft" when sending a draft flow.

3. Remove Draft Mode for Published Flows

If the flow is published, do not include draft mode in your API request. Ensure you are sending the correct request for published flows.

4. Review API Request Formatting

Double-check the request body to ensure mode parameters are correctly set. Refer to Meta’s WhatsApp API Documentation for proper formatting.

5. Update the Flow If Necessary

If the flow was recently modified, ensure it has been saved and properly published before use.

6. Contact Meta Support If the Issue Persists

If none of the above steps resolve the error, reach out to Meta Business Support for further assistance.

For more troubleshooting tips related to WhatsApp API, check out heltar.com/blogs.