How to correctly create a virtual light entity? (Getting `WARNING (MainThread) [homeassistant.helpers.service] Referenced entities light.virtual_dimmer are missing or not currently available`)

[HWiese1980]

I'm trying to create a virtual light entity by setting its state in my PyScript.

@state_trigger("light.virtual_dimmer == 'on'")
def test():
    print("HELLO WORLD!")

attr_dict = {
    "friendly_name": "Virtual dimmer",
    "supported_color_modes": ["brightness"],
    "brightness": 0,
    "icon": "mdi:lightbulb",
    "device_class": "light",
}
state.set("light.virtual_dimmer", "off", attr_dict)

The entity is created, I can see it in the developer tools. However, when I add it to my dashboard and try to swich it off/on (hoping to see "HELLO WORLD" in the logs) instead I'm getting the WARNING (MainThread) [homeassistant.helpers.service] Referenced entities light.virtual_dimmer are missing or not currently available.

What am I doing wrong? How is this supposed to work correctly? Is this possible at all?

Metadata:
Home Assistant: 2025.1
HAOS: 14.1
PyScript: 1.6.1

[Herve78310]

Hi , I have a similar trouble with all input_select,input_boolean and input_number created inside a pyscript module:

            RADIATEURS_MODE_ALL = ["ARRET","LOCAL","VAC"]
            attributes= { "options" : RADIATEURS_MODE_ALL,
                          "editable": "false" ,
                            "friendly_name": "Radiateurs_all"}
            state.set("input_select.radiateurs_all",value="ARRET",new_attributes=attributes)

Impossible to change their value through my dashboad with entity card , with this warning :

            Enregistreur: homeassistant.helpers.service
            Source: helpers/service.py:304
            S'est produit pour la première fois: 10:13:45 (1 occurrences)
            Dernier enregistrement: 10:13:45
            Referenced entities input_select.radiateurs_all are missing or not currently available

However this entity exist :