If http://homeassistant.local:8123 doesn't work, try http://homeassistant:8123. If that does not help, you may be able to find the IP address of Home Assistant Green on your router. The URL will be http://<IP ADDRESS>:8123.

Check if the Home Assistant Green is plugged in and the yellow LED blinks in a heartbeat pattern. For more information on the LED patterns, see Home Assistant Green LEDs.

Check if the LED on the Ethernet port is active. If it is not active, try the following:

1. Try using a different port on your router.

2. Try using a different Ethernet cable.