If people are still stuck for the Supervisor shortcut, use this url…
http://homeassistant.local:8123/hassio/system/info
Create custom panel changes in configuration, problem solved.
panel_custom:
- name: ha_system
sidebar_title: System Info
sidebar_icon: mdi:information-variant
js_url: /api/hassio/app/entrypoint.js
url_path: "hassio/system/info"
embed_iframe: true
require_admin: true
config:
ingress: core_configurator