Error adding entities for domain sensor with platform sems

[alexcool83]

Traceback (most recent call last):
File "/usr/src/homeassistant/homeassistant/helpers/entity_platform.py", line 507, in async_add_entities
await asyncio.gather(*tasks)
File "/usr/src/homeassistant/homeassistant/helpers/entity_platform.py", line 582, in _async_add_entity
entity_name = entity.name
^^^^^^^^^^^
File "/config/custom_components/sems/sensor.py", line 169, in name
return f"Inverter {self.coordinator.data[self.sn]['name']}"

KeyError: 'name'

[RobSmyth]

I think I'm seeing the same error. It was working fine but after a complete system shutdown I get this error:

2023-12-28 11:26:15.418 ERROR (MainThread) [homeassistant.components.template.template_entity] TemplateError('ValueError: Template error: multiply got invalid input 'None' when rendering template '{{ (state_attr('sensor.smart_meter', 'loadStatus') | multiply(-1) * state_attr('sensor.smart_meter', 'grid') | float(0) * 1 / 1000) | round(1) }}' but no default was specified') while processing template 'Template<template=({{ (state_attr('sensor.smart_meter', 'loadStatus') | multiply(-1) * state_attr('sensor.smart_meter', 'grid') | float(0) * 1 / 1000) | round(1) }}) renders=22>' for attribute '_attr_native_value' in entity 'sensor.solar_smart_meter_grid_kw' 2023-12-28 11:26:17.248 ERROR (MainThread) [homeassistant.components.sensor] Error adding entities for domain sensor with platform sems Traceback (most recent call last): File "/usr/src/homeassistant/homeassistant/helpers/entity_platform.py", line 509, in async_add_entities await asyncio.gather(*tasks) File "/usr/src/homeassistant/homeassistant/helpers/entity_platform.py", line 584, in _async_add_entity entity_name = entity.name ^^^^^^^^^^^ File "/config/custom_components/sems/sensor.py", line 169, in name return f"Inverter {self.coordinator.data[self.sn]['name']}" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^ KeyError: 'name'

I have not changed anything that I can think of. Does anybody know how to fix?