Supervisor UI not appearing

Installation
1

I’m running into an issue with the Supervisor UI not appearing at all on a completely clean installation of Home Assistant OS, and I’d appreciate input from anyone familiar with HAOS 17.x or the 2026.x Supervisor/Frontend changes.

2

Not really enough info so I thought I should add this …

System details

  • Home Assistant Core: 2026.4.4
  • Home Assistant OS: 17.2
  • Supervisor: 2026.04.0
  • Docker: 29.3.1
  • Hardware: Raspberry Pi 4 (aarch64)
  • Install type: Fresh HAOS install on a fully wiped and reformatted SD card
  • System status: Healthy, Supported, Supervisor API OK, Version API OK

The issue

  • The Supervisor panel does not appear anywhere in the sidebar or in Settings.
  • The Add-ons section is also missing.
  • Navigating directly to /hassio loads the Matter Server panel, not the Supervisor dashboard.
  • This happens immediately after onboarding, before any configuration or add-ons are installed.
  • The system is not in Safe Mode (confirmed via System Info and available menus).
  • A full OS-level reboot does not change anything.
  • A full clean reinstall (SD card wiped and re-flashed) does not change anything.

What I’ve confirmed

  • Supervisor is running normally in the backend.
  • System Info shows all green: healthy, supported, connected, synchronized.
  • No errors in System → Repairs related to Supervisor or panel loading.
  • This is not a leftover config issue — the SD card was fully reformatted before reinstalling.
  • This is not a cache or browser issue — tested across devices and incognito sessions.

What I suspect

This appears to be a frontend panel registration issue in HAOS 17.x / Supervisor 2026.x, where the Supervisor panel is not being mounted and the /hassio route is being claimed by the Matter Server panel instead.

What I need help with

  • Is this a known regression in HAOS 17.x or Supervisor 2026.x?
  • Is there a way (without SSH) to force the Supervisor panel to re-register?
  • Has the Supervisor UI been moved or gated behind a new setting in the 2026.x builds?
  • Are others seeing the same behaviour on fresh installs?

Any guidance from people running the same OS/Supervisor versions would be very welcome.

3

If this is the first time you have tried Home assistant can I suggest you read the docs. If not the first time I appologise for being blunt.

4

/ Settings , is the “Supervisor-Panel”
/ Add-Ons , Is Now Called /Apps
/ Devices&x Is where you Find /Integrations
Etc.
So beside Reading up on HA, then Click around to get “familiar”, Not any different from any other Software