Hello,

I was asked by a Meta Support guy (thanks Lucas) to post a message here.

I'm trying to add Pre-verified phone numbers for WhatsApp Embedded Signup. I got an error each time I try: (#136023) You do not have permission to access this endpoint.

I double checked the System User Token used and the permissions it has (business_management, pages_messaging, whatsapp_business_management, instagram_manage_messages, whatsapp_business_messaging, public_profile).

I also tried to do it on the Graph API Explorer page and I'm still unable to do it.

I tried with the the same System User Token, results =>

```

Query curl -i -X POST \ "https://graph.facebook.com/v20.0/1649792599121056/add_phone_numbers?phone_number=33780906049&access_token="

Access Token Info { "perms": [ "business_management", "pages_messaging", "whatsapp_business_management", "instagram_manage_messages", "whatsapp_business_messaging", "public_profile" ], "user_id": "122105605604396994", "app_id": 1002083231418824 }

Parameters - Query Parameters {} - POST Parameters { "phone_number": "33780906049" }

Response { "error": { "message": "(#136023) You do not have permission to access this endpoint", "type": "OAuthException", "code": 136023, "fbtrace_id": "AHCU_JvEKkN4BOE1bb9yq-M" } }

Debug Information from Graph API Explorer - https://developers.facebook.com/tools/explorer/?method=POST&path=1649792599121056%2Fadd_phone_numbers&version=v20.0&phone_number=33780906049

And with a fresh User Token generated on the Graph API Explorer page, results =>

```


Query curl -i -X POST \ "https://graph.facebook.com/v20.0/1649792599121056/add_phone_numbers?phone_number=33780906049&access_token="


Access Token Info { "perms": [ "business_management", "pages_messaging", "whatsapp_business_management", "instagram_manage_messages", "whatsapp_business_messaging", "public_profile" ], "user_id": "122105605604396994", "app_id": 1002083231418824 }


Parameters - Query Parameters {} - POST Parameters { "phone_number": "33780906049" }


Response { "error": { "message": "(#136023) You do not have permission to access this endpoint", "type": "OAuthException", "code": 136023, "fbtrace_id": "A7YdbomGPBuuLvSv6CDOXZG" } }

Debug Information from Graph API Explorer - https://developers.facebook.com/tools/explorer/?method=POST&path=1649792599121056%2Fadd_phone_numbers&version=v20.0&phone_number=33780906049

Thanks for your help.

Regards, Johann