Bit hard to say without seeing your config.yaml, but maybe you don’t have frontend: in your config? Please post a copy of your config here using the </> button to format the code for display.
My config is below. I don’t believe this is the issue as I have frontend: in my config and it looks more like I’m missing some sort of package rather than being a config issue.
homeassistant:
# Name of the location where Home Assistant is running
name: Home
# Location required to calculate the time the sun rises and sets
latitude:
longitude:
# Impacts weather/sunrise data (altitude above sea level in meters)
elevation: 5
# metric for Metric, imperial for Imperial
unit_system: metric
# Pick yours from here: http://en.wikipedia.org/wiki/List_of_tz_database_time_zones
time_zone: Europe/London
# Customization file
#customize:
# Enables the frontend
frontend:
# Enables configuration UI
config:
# Enables support for tracking state changes over time
history:
# View all events in a logbook
logbook:
# Sensor
sensor:
- platform: yr
- platform: time_date
display_options:
- 'time'
# Text to speech
tts:
- platform: google
So you tried re-flashing it with etcher using a new download? I’m assuming this is Hass.io from your previous comment and if it is you would be better off asking in the hass.io forum.
I’ve not tried that but can’t see how re-flashing it with the resinOS would resolve the issue. It’s not using Hass.io no, it’s my own setup using Resin.