Error during setup of component customizer

Hi everyone!
I noticed in my logs that the customizer component is giving me an error:

Traceback (most recent call last):
  File "/usr/src/homeassistant/homeassistant/setup.py", line 213, in _async_setup_component
    result = await task
  File "/config/custom_components/customizer/__init__.py", line 118, in async_setup
    hass.services.async_register(DOMAIN, SERVICE_SET_ATTRIBUTE,
TypeError: async_register() takes from 4 to 5 positional arguments but 6 were given

It is doing so by a few updates both of HA and supervisor.
Is there anyone who knows why this happens? I’ve everything at the latest version (supervisor-2021.01.5, core-2021.1.4, Home Assistant OS 5.10).

Thanks!