When trying to send message using WhatsApp cloud API, we have abruptly started receiving "(#135000) Generic user error" but we are not getting any explanation for the same.

{ "error": { "message": "(#135000) Generic user error", "type": "OAuthException", "code": 135000, "error_data": { "messaging_product": "whatsapp", "details": "Generic user error" }, "fbtrace_id": "A7O_7C7NrKL2Wf4WtBN_gEn" } }