My laptop (a Dell Latitude 5400, running Ubuntu 26.04) is also affected by this. /usr/libexec/geoclue-2.0/demos/where-am-i is able to get my location, yet go-hass-agent always reports the same error it does for OP:

1:17PM DEBUG Location updated.
1:17PM DEBUG Invalid sensor data. error="contains field errors\ninvalid field Name (value(\"\")) failed validation for required: Key: 'Sensor.Name' Error:Field validation for 'Name' failed on the 'required' tag\ninvalid field State (value(\"<nil>\")) failed validation for required: Key: 'Sensor.State' Error:Field validation for 'State' failed on the 'required' tag\ninvalid field Type (value(\"\")) failed validation for required: Key: 'Sensor.Type' Error:Field validation for 'Type' failed on the 'required' tag\ninvalid field UniqueID (value(\"\")) failed validation for required: Key: 'Sensor.UniqueID' Error:Field validation for 'UniqueID' failed on the 'required' tag

The device tracker’s state in HA remains ”Unknown”.

God, what an unintuitive trick they’ve come up with for that locking mechanism. Thanks for taking one for the team!