The integration fails to start after updating from 1.3.x to latest. Does this log tell you anything? I use this every day so hopefully we can sort it out :)
2023-10-05 12:27:54.000 WARNING (SyncWorker_3) [homeassistant.loader] We found a custom integration bangolufsen which has not been tested by Home Assistant. This component might cause stability problems, be sure to disable it if you experience issues with Home Assistant
2023-10-05 12:30:20.059 ERROR (MainThread) [homeassistant.setup] Setup failed for custom integration bangolufsen: Unable to import component: cannot import name 'DeviceInfo' from 'homeassistant.helpers.device_registry' (/usr/src/homeassistant/homeassistant/helpers/device_registry.py)
File "/config/custom_components/bangolufsen/__init__.py", line 26, in <module>
File "/config/custom_components/bangolufsen/binary_sensor.py", line 16, in <module>
from .entity import BangOlufsenEntity
File "/config/custom_components/bangolufsen/entity.py", line 7, in <module>
2023-10-05 12:31:54.843 ERROR (MainThread) [homeassistant.config_entries] Error occurred loading flow for integration bangolufsen: cannot import name 'DeviceInfo' from 'homeassistant.helpers.device_registry' (/usr/src/homeassistant/homeassistant/helpers/device_registry.py)
2023-10-05 12:31:54.847 ERROR (MainThread) [homeassistant.config_entries] Error occurred loading flow for integration bangolufsen: cannot import name 'DeviceInfo' from 'homeassistant.helpers.device_registry' (/usr/src/homeassistant/homeassistant/helpers/device_registry.py)
File "/config/custom_components/bangolufsen/__init__.py", line 26, in <module>
File "/config/custom_components/bangolufsen/binary_sensor.py", line 16, in <module>
from .entity import BangOlufsenEntity
File "/config/custom_components/bangolufsen/entity.py", line 7, in <module>
2023-10-05 13:21:17.691 WARNING (SyncWorker_2) [homeassistant.loader] We found a custom integration bangolufsen which has not been tested by Home Assistant. This component might cause stability problems, be sure to disable it if you experience issues with Home Assistant