Can't update Home Assistant Core 2026.5.0

Installation
1

I am totally stuck on Home Assistant Core 2026.5.0 .

  1. I have tried updating from the GUI but it gets to 100% and then shows that it didn't update.
  2. Tried the command line interface (CLI via Advanced SSH & Web Terminal). It actually says it was successful but the GUI shows it is still stuck on 2026.5.0 .
  3. I tried to downgrade to 2026.4.4 via the CLI and again it said it was successful but the GUI still shows it is stuck on 2026.5.0 .
  4. I tried to upgrade in safe mode but still no cigar.
  5. Everything else can update just fine (NodeRed, Apps, Supervisor, etc.)
  • Installation method Home Assistant OS
  • Core 2026.5.0
  • Supervisor 2026.05.1
  • Operating System 17.3
  • Frontend 20260429.3

Memory usage, Now, 30.5%
Memory free, 4 seconds ago, 2,659.30 MiB
Processor use, 30 seconds ago, 1%
Disk usage, 2 hours ago, 10.3%
Disk free, 2 hours ago, 188.80 GiB

Is there some trick I'm not using? What am I missing?

2

Checking the logs(RAW Log!), enable debug, and run again to get more info

3

Have you cleared your browser cache?

4

:laughing: Don't worry, this one will definitely be "on site."

5

Did you restart HAOS? Physical machine, not just HA restart!

6

Log details (ERROR)

Logger: homeassistant.components.websocket_api.http.connection
Source: components/websocket_api/commands.py:332
Integration: Home Assistant WebSocket API (documentation, issues)
First occurred: June 12, 2026 at 11:22:07 PM (1 occurrence)
Last logged: June 12, 2026 at 11:22:07 PM

[140157293690720] Error during service call to update.install: Error updating Home Assistant Core: Downloading Home Assistant version 2026.6.3 failed

8

Yes, I restarted the physical machine on several occasions to try and fix the problem.

9

Yes, I cleared the browser cache. Didn't seem to do anything. :frowning:

10

This error suggests that perhaps Home Assistant can't connect to the internet to download latest image...?

11

Yes, it does sound like it has a connection problem, except that it can download and install updates for everything else. I'm on fiber and everything works fine. Which makes me think all the Core updates for my type of machine are corrupt, incomplete, or are on a bad server. CPU architecture x86_64