After installation I try to start the UI with hass --open-ui.
I must admit it’s all new to me, but just following the instructions here.
My term displays a lot of info but stops at: 2019-04-24 17:36:06 INFO (MainThread) [homeassistant.components.discovery] Unknown service discovered: home_assistant {‘host’: ‘192.168.178.21’, ‘port’: 8123, ‘hostname’: ‘Home._home-assistant._tcp.local.’, ‘properties’: {‘version’: ‘0.91.4’, ‘base_url’: ‘http://192.168.178.21:8123’, ‘requires_api_password’: True}}
However, launching HA does not launch that shell - if the OP is expecting some UI to appear (since the argument --open-ui does hint at that) then they’re not going to get one.
(I’d also argue that it’s not a Home Assistant UI, since it’s Hass.io specific )