Unable to add / setup Lutron Caseta Integration

Hello Everyone.
I have Lutron Homeworks QSx HQP7 series system installed in my home.
I proceed as normal to add the device to home assistant by selecting lutron caseta integration in home assistant and then entering my ip address after which i was waiting for home assistant to ask me to press the switch on lutron processor bridge.
But even after trying multiple times it says “unknown error occurred” and fails to setup.
My Lutron system has physical button on it.
My other Lutron system of the same model and make is working absolutely fine and i was able to add it to home assistant easily.

Below is the log:

Logger: aiohttp.server
Source: /usr/local/lib/python3.11/site-packages/aiohttp/web_protocol.py:403
First occurred: 4:17:14 PM (1 occurrences)
Last logged: 4:17:14 PM

Error handling request
Traceback (most recent call last):
  File "/usr/local/lib/python3.11/site-packages/aiohttp/web_protocol.py", line 433, in _handle_request
    resp = await request_handler(request)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.11/site-packages/aiohttp/web_app.py", line 504, in _handle
    resp = await handler(request)
           ^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.11/site-packages/aiohttp/web_middlewares.py", line 117, in impl
    return await handler(request)
           ^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/src/homeassistant/homeassistant/components/http/security_filter.py", line 85, in security_filter_middleware
    return await handler(request)
           ^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/src/homeassistant/homeassistant/components/http/forwarded.py", line 100, in forwarded_middleware
    return await handler(request)
           ^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/src/homeassistant/homeassistant/components/http/request_context.py", line 28, in request_context_middleware
    return await handler(request)
           ^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/src/homeassistant/homeassistant/components/http/ban.py", line 80, in ban_middleware
    return await handler(request)
           ^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/src/homeassistant/homeassistant/components/http/auth.py", line 236, in auth_middleware
    return await handler(request)
           ^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/src/homeassistant/homeassistant/components/http/headers.py", line 31, in headers_middleware
    response = await handler(request)
               ^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/src/homeassistant/homeassistant/components/http/view.py", line 148, in handle
    result = await handler(request, **request.match_info)
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/src/homeassistant/homeassistant/components/http/decorators.py", line 63, in with_admin
    return await func(self, request, *args, **kwargs)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/src/homeassistant/homeassistant/components/config/config_entries.py", line 177, in post
    return await super().post(request, flow_id)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/src/homeassistant/homeassistant/components/http/data_validator.py", line 72, in wrapper
    result = await method(view, request, data, *args, **kwargs)
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/src/homeassistant/homeassistant/helpers/data_entry_flow.py", line 110, in post
    result = await self._flow_mgr.async_configure(flow_id, data)
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/src/homeassistant/homeassistant/data_entry_flow.py", line 293, in async_configure
    result = await self._async_handle_step(
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/src/homeassistant/homeassistant/data_entry_flow.py", line 389, in _async_handle_step
    result: FlowResult = await getattr(flow, method)(user_input)
                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/src/homeassistant/homeassistant/components/lutron_caseta/config_flow.py", line 64, in async_step_user
    return await self.async_step_link()
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/src/homeassistant/homeassistant/components/lutron_caseta/config_flow.py", line 106, in async_step_link
    and await self.async_get_lutron_id()
        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/src/homeassistant/homeassistant/components/lutron_caseta/config_flow.py", line 229, in async_get_lutron_id
    await bridge.connect()
  File "/usr/local/lib/python3.11/site-packages/pylutron_caseta/smartbridge.py", line 106, in connect
    await self._login_completed
  File "/usr/local/lib/python3.11/site-packages/pylutron_caseta/smartbridge.py", line 692, in _login
    await self._load_ra3_devices()
  File "/usr/local/lib/python3.11/site-packages/pylutron_caseta/smartbridge.py", line 797, in _load_ra3_devices
    await self._load_ra3_control_stations(area)
  File "/usr/local/lib/python3.11/site-packages/pylutron_caseta/smartbridge.py", line 853, in _load_ra3_control_stations
    await self._load_ra3_station_device(
  File "/usr/local/lib/python3.11/site-packages/pylutron_caseta/smartbridge.py", line 926, in _load_ra3_station_device
    for button_json in button_expanded_json["Buttons"]:
                       ~~~~~~~~^^^^^^^^^^^
KeyError: 'Buttons'

Hope someone could help.

Are you selecting the right integation?

Yes.
I have read the Home Assistant Lutron Integration document and i need to select Lutron Caseta for my device HQP7 Leap protocol based.
https://www.home-assistant.io/integrations/lutron_caseta/
Also i have one device setup at different location using the same.
I just dont understand whats going wrong.