Could not detect firmware format (ZW1506)

I have multiple sensors that fail to update with this error:

Logger: homeassistant.components.websocket_api.http.connection
Source: components/zwave_js/update.py:275
Integration: Home Assistant WebSocket API (documentation, issues)
First occurred: 7:38:45 PM (2 occurrences)
Last logged: 7:38:58 PM

[547658247616] Z-Wave error 1506: Downloading the firmware update for node 20 failed: Could not detect firmware format (ZW1506)
Traceback (most recent call last):
  File "/usr/src/homeassistant/homeassistant/components/zwave_js/update.py", line 270, in async_install
    await self.driver.controller.async_firmware_update_ota(
  File "/usr/local/lib/python3.11/site-packages/zwave_js_server/model/controller/__init__.py", line 788, in async_firmware_update_ota
    data = await self.client.async_send_command(
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.11/site-packages/zwave_js_server/client.py", line 116, in async_send_command
    return await future
           ^^^^^^^^^^^^
zwave_js_server.exceptions.FailedZWaveCommand: Z-Wave error 1506: Downloading the firmware update for node 20 failed:
Could not detect firmware format (ZW1506)

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "/usr/src/homeassistant/homeassistant/components/websocket_api/commands.py", line 226, in handle_call_service
    await hass.services.async_call(
  File "/usr/src/homeassistant/homeassistant/core.py", line 1974, in async_call
    response_data = await coro
                    ^^^^^^^^^^
  File "/usr/src/homeassistant/homeassistant/core.py", line 2011, in _execute_service
    return await target(service_call)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/src/homeassistant/homeassistant/helpers/entity_component.py", line 235, in handle_service
    return await service.entity_service_call(
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/src/homeassistant/homeassistant/helpers/service.py", line 870, in entity_service_call
    response_data = await _handle_entity_call(
                    ^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/src/homeassistant/homeassistant/helpers/service.py", line 942, in _handle_entity_call
    result = await task
             ^^^^^^^^^^
  File "/usr/src/homeassistant/homeassistant/components/update/__init__.py", line 157, in async_install
    await entity.async_install_with_progress(version, backup)
  File "/usr/src/homeassistant/homeassistant/components/update/__init__.py", line 421, in async_install_with_progress
    await self.async_install(version, backup)
  File "/usr/src/homeassistant/homeassistant/components/zwave_js/update.py", line 275, in async_install
    raise HomeAssistantError(err) from err
homeassistant.exceptions.HomeAssistantError: Z-Wave error 1506: Downloading the firmware update for node 20 failed:
Could not detect firmware format (ZW1506)

I am seeing the same. I also tried going directly to my zwavejs proxy and get the same issue.

Upgrade your Z-Wave JS, this bug was fixed. Only the official add-on (Z-Wave JS) is not supported yet.