Platform not found: sensor.clear_grass

Hi! Try to install
I have create dir C:\Documents and Settings\USER\Application Data.homeassistant\custom_components\clear_grass and copy two files and
And edit configuration.yaml
# Weather prediction
- platform: yr
# Same as Xiaomi Air Quality Monitor
- platform: clear_grass
name: Xiaomi ClearGrass Air Detector
token: token

But get error
2019-05-27 23:36:05 WARNING (MainThread) [homeassistant.loader] You are using a custom integration for clear_grass which has not been tested by Home Assistant. This component might cause stability problems, be sure to disable it if you do experience issues with Home Assistant.
2019-05-27 23:43:31 ERROR (MainThread) [homeassistant.components.homeassistant] Platform not found: sensor.clear_grass

@almirus did you solve the problem? I have the same.