I want to implement "WhatsApp Business API Client" in my web application. I want to send document from my web application to customer using "WhatsApp Business API Client". I have flow the instruction from bellow link

https://developers.facebook.com/docs/whatsapp/on-premises/get-started 

I have created both Facebook and WhatsApp business account. I have also created app in Facebook and verify my business through Facebook. After that I have started to install "WhatsApp Business API Client" using docker. I have flow bellow link to install docker

https://developers.facebook.com/docs/whatsapp/on-premises/get-started/installation/dev-single-instance#step-6--login-and-authenticate 

1. I have created "biz" using command from terminal

2. set WhatsApp API version "2.31.5" 3 Run "docker-compose up -d" from terminal. But when I run the above command then face some error in terminal Error are given bellow

   C:\xampp\htdocs\whatapp>docker-compose up -d

   Traceback (most recent call last): File "docker\api\client.py", line 214, in _retrieve_server_version

   File "docker\api\daemon.py", line 181, in version

   File "docker\utils\decorators.py", line 46, in inner

   File "docker\api\client.py", line 237, in _get

   File "requests\sessions.py", line 543, in get

   File "requests\sessions.py", line 530, in request

   File "requests\sessions.py", line 643, in send

   File "requests\adapters.py", line 439, in send

   File "urllib3\connectionpool.py", line 670, in urlopen

   File "urllib3\connectionpool.py", line 392, in _make_request

   File "http\client.py", line 1255, in request

   File "http\client.py", line 1301, in _send_request

   File "http\client.py", line 1250, in endheaders

   File "http\client.py", line 1010, in _send_output

   File "http\client.py", line 950, in send

   File "docker\transport\npipeconn.py", line 32, in connect

   File "docker\transport\npipesocket.py", line 23, in wrapped

   File "docker\transport\npipesocket.py", line 72, in connect

   File "docker\transport\npipesocket.py", line 52, in connect

   pywintypes.error: (2, 'CreateFile', 'The system cannot find the file specified.')

   During handling of the above exception, another exception occurred:

   Traceback (most recent call last): File "docker-compose", line 3, in

   File "compose\cli\main.py", line 81, in main

   File "compose\cli\main.py", line 200, in perform_command

   File "compose\cli\command.py", line 60, in project_from_options

   File "compose\cli\command.py", line 152, in get_project

   File "compose\cli\docker_client.py", line 41, in get_client

   File "compose\cli\docker_client.py", line 170, in docker_client

   File "docker\api\client.py", line 197, in init

   File "docker\api\client.py", line 221, in _retrieve_server_version

   docker.errors.DockerException: Error while fetching server API version: (2, 'CreateFile', 'The system cannot find the file specified.')

   [6012] Failed to execute script docker-compose

Please help me how solve the issue. Thank You

I am trying to understand something about WhatsApp group messaging API for businesses. The question is: In order to send a message to a group as a business, does my business user have to explicitly be a member of that group? In other words, I want to create a group with a few of my customers via the API, but to post messages there without the need to have my business user to be explicitly listed among the group members.

I went over their official docs: https://developers.facebook.com/docs/whatsapp/api/messages/group/ https://developers.facebook.com/docs/whatsapp/api/groups/

I also read this post (on which I would comment - if I had enough reputation) : How to send message on WhatsApp Group using official API

I didn't find an answer on this question there. Does anyone know?

Thanks :-)