Disclaimer: The majority of these errors occur due to your violation of Meta's policies. Kindly follow these rules for a seamless experience with Pabbly Chatflow
Types of Messaging errors you might face in Pabbly Chatflow
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Temporarily blocked for policy violations If your account has been temporarily blocked or restricted, there are chances you might have violated a platform policy. See the Policy Enforcement document to learn about policy violations and how to resolve them.
Solution:
- Review Meta’s Policy Enforcement guidelines to identify the violation.
- Adjust messaging to comply with Meta’s rules (no spam or prohibited content).
- Pause all campaigns or messages that might have caused the violation.
2)Required parameter is missing
If you encounter the issue "Required parameter is missing," you might have misspelt the parameter or used it wrong.
Solution:
To prevent this issue, check whether you've correctly enclosed the parameter or not! Read this guide on :
3) Error Code 131026: Message Undeliverable
This error occurs when a message cannot be delivered to the recipient. Common reasons include:
- The recipient’s phone number is not registered as a WhatsApp number.
- The recipient has not accepted WhatsApp’s new Terms of Service and Privacy Policy.
- The recipient is using an outdated WhatsApp version. The minimum required versions are:
- Android: 2.21.15.15
- SMB Android (SMBA): 2.21.15.15
- iOS: 2.21.170.4
- SMB iOS (SMBI): 2.21.170.4
- KaiOS: 2.2130.10
- Web: 2.2132.6
- WhatsApp Anti-Spam measures may restrict messages if the user has never interacted with the business or doesn’t usually engage with messages from Business APIs. This restriction can last 24 to 48 hours to maintain high-quality user experience.
- The message was blocked to maintain per-user marketing template message limits.
Solution: Ask the WhatsApp user (via non-WhatsApp communication) to:
- Confirm they can send messages to your WhatsApp Business number.
- Check that your WhatsApp Business API number is not blocked in their settings (Settings > Privacy > Blocked Contacts).
- Ensure they have accepted the latest WhatsApp Terms of Service (found under Settings > Help or Application Information).
- Update their WhatsApp app to the latest version.
If none of these resolve the issue, try messaging the user again after 24 hours.
4) Error Code 131009: Parameter value is not valid
This error occurs when one or more parameter values sent in your API request are invalid or unsupported. This often happens if:
- Parameters are misspelled or formatted incorrectly.
- The value type does not match the expected data type.
- Required parameters are missing or incorrectly provided.
- Phone numbers are not correctly linked to your WhatsApp Business Account.
Solution:
- Review the API endpoint documentation to confirm all parameters and values match the requirements.
- Verify phone numbers are properly added to your WhatsApp Business Account as explained in the Phone Numbers guide.
- Correct any invalid or unsupported parameter values in your request and retry.
5) Error Code 132001: Template Does Not Exist
This error indicates that the specified message template could not be found. Common causes include:
- The template is not available in the specified language.
- The template has not yet been approved by WhatsApp.
- Incorrect template name or language locale was provided.
- The template does not adhere to WhatsApp’s message template guidelines.
If you encounter this error while sending a broadcast, it may be due to the template being unavailable in the chosen language or pending approval.
Solution:
- Confirm that the template has been approved in your WhatsApp Business Account.
- Verify that the template name and language locale used in your request are accurate.
- Ensure compliance with WhatsApp’s template messaging guidelines.
- If the template is unapproved, submit it for approval through your WhatsApp Business Manager.
6) Error Code 131047: Re-engagement Message
This error happens when you try to send a regular message to someone more than 24 hours after they last replied to you on WhatsApp. WhatsApp only allows free messages within 24 hours of their last reply to protect users from spam.
Solution:
- To message them after 24 hours, use a pre-approved message template designed for business-initiated messages.
- Make sure the message template is approved and follows WhatsApp’s rules.
- Check WhatsApp’s guide on message templates for more help.
7) Error Code 190: Access Token Expired
This error means your access token (which lets Pabbly Chatflow connect to Meta/WhatsApp) has expired.
Solution:
- You need to get a new access token to restore the connection.
- Generate a fresh access token from your Meta Developer account.
- Update your system with the new token to continue sending messages.
8) Error Code 131051: Unsupported Message Type
This error occurs when you try to send a message type that the WhatsApp Cloud API does not support.
The WhatsApp Cloud API supports only specific message formats. Using unsupported types will result in this error.
Solution:
- Check the official WhatsApp Cloud API documentation for supported message types: Supported Message Types
- Ensure the message you are sending is one of the supported formats.
- If your message type is unsupported, change it to a supported message format as per the documentation.
9) Error Code 131049: Message Not Delivered to Maintain Healthy Ecosystem Engagement
This error comes from Meta when you try to send the same message template to a user who didn’t reply to your last message. WhatsApp blocks it to stop spam and keep conversations meaningful.
Sending the same message repeatedly without user response can lower your message template’s quality score, which can cause more restrictions.
Solution:
- Do not retry sending immediately after this error.
- Retry sending after waiting longer each time (e.g., minutes, then hours).
- Follow message volume limits to avoid this error.
- For details, check WhatsApp Message Limits.
Also, note that message frequency, rate limits, or policy violations may also cause delivery failures.
Originally posted by Manali Verma on 2025-05-27 (forum thread #29399).
