Unique ID missing, calling a service gives "unknown error", running core-2021.5.0 HA-OS

[50915091Mica]

Hi there, I have been swimming in waters I do not understand anymore, so please help.
I have set all as described, the entity and its values is there properly but only for "reading", cannot call a service, cannot use as automation.

Logger: homeassistant.components.websocket_api.http.connection
Source: helpers/config_validation.py:133
Integration: Home Assistant WebSocket API (documentation, issues)
First occurred: 12:50:13 (1 occurrences)
Last logged: 12:50:13

[139909373028240] Error handling message: Unknown error
Traceback (most recent call last):
File "/usr/src/homeassistant/homeassistant/components/websocket_api/decorators.py", line 21, in _handle_async_response
await func(hass, connection, msg)
File "/usr/src/homeassistant/homeassistant/components/websocket_api/commands.py", line 482, in handle_execute_script
await script_obj.async_run(msg.get("variables"), context=context)
File "/usr/src/homeassistant/homeassistant/helpers/script.py", line 1209, in async_run
await asyncio.shield(run.async_run())
File "/usr/src/homeassistant/homeassistant/helpers/script.py", line 345, in async_run
await self._async_step(log_exceptions=False)
File "/usr/src/homeassistant/homeassistant/helpers/script.py", line 363, in _async_step
await getattr(self, handler)()
File "/usr/src/homeassistant/homeassistant/helpers/script.py", line 563, in _async_call_service_step
await service_task
File "/usr/src/homeassistant/homeassistant/core.py", line 1435, in async_call
processed_data = handler.schema(service_data)
File "/usr/local/lib/python3.8/site-packages/voluptuous/validators.py", line 218, in call
return self._exec((Schema(val) for val in self.validators), v)
File "/usr/local/lib/python3.8/site-packages/voluptuous/validators.py", line 337, in _exec
v = func(v)
File "/usr/local/lib/python3.8/site-packages/voluptuous/schema_builder.py", line 272, in call
return self._compiled([], data)
File "/usr/local/lib/python3.8/site-packages/voluptuous/schema_builder.py", line 817, in validate_callable
return schema(data)
File "/usr/src/homeassistant/homeassistant/helpers/config_validation.py", line 133, in validate
raise vol.Invalid("must contain at least one of {}.".format(", ".join(keys)))
TypeError: sequence item 0: expected str instance, Optional found

[igorsantos07]

The ID is indeed missing, and the FAQ it links to kinda says the issue is with the integration?

It doesn't seem possible to try out the device with Developer Tools > Services > Vacuum: Locate, for instance. However, I was able to make it run via the new Dashboard box that appeared.