Custom_Compoment -Creating platform instead of create device with ClimateEntity

Hello, I have an issue with my first integration
This integration is a Climate with some Sensors to control a stove.
When adding the integration through the UI, it looks like HA is creating a new platform integration instead of a device with entities.
I have errors in log relative to platform integrations but I don’t understand why exactly.

ModuleNotFoundError: No module named 'custom_components.hottoh_cmg.system_health'
ModuleNotFoundError: No module named 'custom_components.hottoh_cmg.media_source'
ModuleNotFoundError: No module named 'custom_components.hottoh_cmg.group'
ModuleNotFoundError: No module named 'custom_components.hottoh_cmg.logbook'
ModuleNotFoundError: No module named 'custom_components.hottoh_cmg.recorder'

Is someone can have a quick look to the repo and give me some input where to look at.

Thanks.

Benoît