core: Hunter Douglas Powerview: TypeError: unsupported operand type(s) for /: 'NoneType' and 'int'

The problem

Logger: homeassistant.helpers.script.websocket_api_script
Source: helpers/script.py:485
First occurred: 1:34:21 PM (9 occurrences)
Last logged: 2:25:19 PM

websocket_api script: Error executing script. Unexpected error for choose at pos 1: unsupported operand type(s) for /: 'NoneType' and 'int'
websocket_api script: Error executing script. Unexpected error for call_service at pos 1: unsupported operand type(s) for /: 'NoneType' and 'int'
websocket_api script: Set Kitchen Blinds if GloomyTV is on: If at step 1: Error executing script. Unexpected error for call_service at pos 1: unsupported operand type(s) for /: 'NoneType' and 'int'
websocket_api script: Set Kitchen Blinds if GloomyTV is on: Error executing script. Unexpected error for if at pos 1: unsupported operand type(s) for /: 'NoneType' and 'int'
websocket_api script: Error executing script. Unexpected error for if at pos 1: unsupported operand type(s) for /: 'NoneType' and 'int'
Traceback (most recent call last):
  File "/usr/src/homeassistant/homeassistant/helpers/script.py", line 485, in _async_step
    await getattr(self, handler)()
  File "/usr/src/homeassistant/homeassistant/helpers/script.py", line 723, in _async_call_service_step
    response_data = await self._async_run_long_action(
                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/src/homeassistant/homeassistant/helpers/script.py", line 685, in _async_run_long_action
    return long_task.result()
           ^^^^^^^^^^^^^^^^^^
  File "/usr/src/homeassistant/homeassistant/core.py", line 2319, in async_call
    response_data = await coro
                    ^^^^^^^^^^
  File "/usr/src/homeassistant/homeassistant/core.py", line 2356, in _execute_service
    return await target(service_call)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/src/homeassistant/homeassistant/helpers/service.py", line 905, in entity_service_call
    single_response = await _handle_entity_call(
                      ^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/src/homeassistant/homeassistant/helpers/service.py", line 975, in _handle_entity_call
    result = await task
             ^^^^^^^^^^
  File "/usr/src/homeassistant/homeassistant/components/hunterdouglas_powerview/cover.py", line 174, in async_close_cover
    self._async_schedule_update_for_transition(self.transition_steps)
                                               ^^^^^^^^^^^^^^^^^^^^^
  File "/usr/src/homeassistant/homeassistant/components/hunterdouglas_powerview/cover.py", line 682, in transition_steps
    primary = (self.positions.primary / 2) + 50
               ~~~~~~~~~~~~~~~~~~~~~~~^~~
TypeError: unsupported operand type(s) for /: 'NoneType' and 'int'

What version of Home Assistant Core has the issue?

core-2024.3.0

What was the last working version of Home Assistant Core?

No response

What type of installation are you running?

Home Assistant OS

Integration causing the issue

Hunter Douglas PowerView

Link to integration documentation on our website

https://www.home-assistant.io/integrations/hunterdouglas_powerview/

Diagnostics information

When calling Cover.Close or Cover.Open on one of my duolite blinds I can sometimes get the above stacktrace. It seems that once this happens to one blind, it continues to happen to that same blind unless/until I restart the integration. Once I do, it begins working again.

Example YAML snippet

No response

Anything in the logs that might be useful for us?

Just the above stack trace.

Additional information

No response