The issue you're encountering stems from the token lacking permission to use the phone number associated with the specific object ID. I discovered that this error occurred because I was using the wrong Facebook app. I suggest verifying whether you're selecting the correct app in your configuration (App selection is at the top level corner of the Facebook developer page).

Regarding the inability to receive the webhook, here are a couple of potential causes to check:

Webhook Errors:

• There might be an error when the webhook is triggered.
• Review the error codes, return message statuses, and HTTP status codes to ensure that the webhook is reaching the intended endpoints without issues.

Token Permissions and Validation:

• Verify that your Graph API token has the required permissions.
• Ensure that the app signatures and tokens are properly validated to allow messages to be sent successfully.

Addressing these areas should help resolve the issue.