| 0 | AuthException | Unable to authenticate the app user. | Access token expired, revoked, or invalid. Generate a new access token and reconnect the account. | 401 |
| 10 | Permission Denied | Permission not granted. | Required permissions are missing or removed. Re-authorize the WhatsApp Business account. | 403 |
| 190 | Invalid OAuth Token | Token expired or invalid. | Generate a new access token and update it in your integration settings. | 401 |
| 200 | Permission Error | User does not have permission. | Ensure the app has required WhatsApp permissions and is approved. | 403 |
| 131000 | Message Send Failed | Unable to deliver message. | Recipient number is invalid or unreachable. Verify the phone number format. | 400 |
| 131009 | Message Type Not Supported | Unsupported message type. | Ensure the message format (text, template, media) is valid and approved. | 400 |
| 131047 | Re-engagement Required | User has not interacted in 24 hours. | Use an approved message template to re-initiate conversation. | 403 |
| 131053 | Media Download Failed | Media URL inaccessible. | Ensure media URL is publicly accessible and uses HTTPS. | 400 |
| 132000 | Template Not Found | Template does not exist. | Check template name, language code, and approval status. | 404 |
| 132001 | Template Parameter Missing | Required parameter missing. | Ensure all placeholders in the template are filled correctly. | 400 |
| 132005 | Template Not Approved | Template is pending or rejected. | Submit the template for approval and wait for Meta approval. | 403 |
| 132007 | Template Paused | Template is paused by Meta. | Review template compliance and re-submit if required. | 403 |
| 131026 | Phone Number Not Registered | Number not linked to WhatsApp. | Ensure the phone number is registered and verified. | 400 |
| 131030 | Business Account Inactive | WhatsApp Business account inactive. | Verify business account status in Meta Business Manager. | 403 |
| 131031 | Account Rate Limited | Too many requests. | Reduce message rate or request a higher messaging tier. | 429 |
| 131052 | Media Upload Failed | Media file upload failed. | Check file size, format, and upload URL. | 400 |
| 131056 | Unsupported Media Type | File type not supported. | Use supported formats (JPEG, PNG, MP4, PDF). | 400 |
| 1 | Unknown Error | Generic system error. | Retry request after some time. If persistent, contact support. | 500 |
| 2 | Service Unavailable | WhatsApp servers unavailable. | Retry after some time. Monitor Meta status updates. | 503 |
| 4 | Rate Limit Exceeded | Too many API calls. | Reduce API requests or upgrade rate limits. | 429 |
