Netgear errors in the log and missing sensors

I have a Netgear X6 R8000 router at home. I configured it in Home Assistant OS using the Netgear integration available. I do get some entites available to me, however, other sensors mentioned on the official page (NETGEAR - Home Assistant) are not available. I did notice that in my home assistant log, I see following snippet periodically.

2022-08-26 11:40:27.036 ERROR (SyncWorker_4) [pynetgear.router] Netgear ReadTimeout, service 'DeviceInfo:1', method 'GetAttachDevice', host 192.168.56.1:5000 ssl False
2022-08-26 11:40:27.041 ERROR (MainThread) [homeassistant.components.netgear] Unexpected error fetching R8000 Devices data: cannot unpack non-iterable NoneType object
Traceback (most recent call last):
  File "/usr/src/homeassistant/homeassistant/helpers/update_coordinator.py", line 205, in _async_refresh
    self.data = await self._async_update_data()
  File "/usr/src/homeassistant/homeassistant/helpers/update_coordinator.py", line 164, in _async_update_data
    return await self.update_method()
  File "/usr/src/homeassistant/homeassistant/components/netgear/__init__.py", line 79, in async_update_devices
    return await router.async_update_device_trackers()
  File "/usr/src/homeassistant/homeassistant/components/netgear/router.py", line 191, in async_update_device_trackers
    ntg_devices = await self.async_get_attached_devices()
  File "/usr/src/homeassistant/homeassistant/components/netgear/router.py", line 179, in async_get_attached_devices
    return await self.hass.async_add_executor_job(
  File "/usr/local/lib/python3.10/concurrent/futures/thread.py", line 58, in run
    result = self.fn(*self.args, **self.kwargs)
  File "/usr/local/lib/python3.10/site-packages/pynetgear/router.py", line 538, in get_attached_devices
    success, response = self._make_request(
TypeError: cannot unpack non-iterable NoneType object

What is causing these errors?