Found this thread:
Looks like a bug?
Anyway, I am testing a workaround, instead of before sunrise or after sunset I am using:
condition: state
entity_id: sun.sun
state: 'below_horizon'
Seems to be working, light do turn on 
I am still getting an error, though:
Configuration invalidCHECK CONFIG
Invalid config for [automation]: expected a dictionary @ data['condition'][0]. Got None extra keys not allowed @ data['entity_id']. Got None extra keys not allowed @ data['state']. Got None. (See /config/configuration.yaml, line 104). Please check the docs at https://home-assistant.io/components/automation/
- id: '1547866606884'
alias: Ugasni luči.
trigger:
- entity_id: device_tracker.huawei_mate_20_pro
from: home
platform: state
to: not_home
- event: sunrise
platform: sun
condition: []
action:
- data: {}
entity_id: group.all_lights
service: light.turn_off
- id: '1547865918090'
alias: Prižgi luči.
trigger:
- entity_id: device_tracker.huawei_mate_20_pro
from: not_home
platform: state
to: home
- event: sunset
platform: sun
condition: state
entity_id: sun.sun
state: 'below_horizon'
action:
- entity_id: group.all_lights
service: light.turn_on