After latest core update 2025.12.4 almost everything is broken

My Info:

  • Installation method Home Assistant OS
  • Core 2025.12.4
  • Supervisor 2025.12.3
  • Operating System 16.3
  • Frontend 20251203.3

After the update I am able to see my dashboards for a few seconds, but then they go away and I am left with a button that says reloadUI. It does not work.

I can get to settings, automations and a few other locations but not devices, dashboards, energy…

Home Assistant Cloud is stuck at “loading…”

Voice Assistant brings up a page with a login button on it but the login page never loads.

My backup section says there are no backups but there are in Nabu Casa.

Please help!

If you need any other information please let me know.

Thank you!

What hardware platform are you using? Virtual? Any fancy networking setups?

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Sorry, It’s running on a Intel NUK i7 16GB ram and 1TB SSD HD. Not virtual.
No fancy network setups.

Some further testing:

If I refresh the webpage, everything works for a few seconds like I mentioned.
But if I refresh while on settings, I can open everything fine until I open any dashboard. Once I do that I am back to the “reloadUI” button. All of my automations are still running. Very odd.

Does clearing your browser cache help?

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