New system sometimes available from one browser but not another

Installation
1

Hi – Completely new system by a completely new-to-HA user.

I got it up and running with no issues. Logged in. Connected a couple of SwitchBot temperature/humidity sensors. Created a new dashboard with one graph on it.

Everything was working as expected. That was several days ago.

Today the HA web page (http://homeassistant.local:8123/) would not load using my usual browser (Arc on a Mac). It says “This page isn’t working: homeassistant.local didn’t send any data.” Meanwhile, Safari and Firefox (same machine) seem to work fine.

I used Developer Tools -> Restart on one of the browsers that is working. It took longer than I expected (2-3 minutes?) but eventually reconnected and worked fine. However, my normal browser still does not. Just to be clear, my normal browser used to work.

Why? How do I fix this?

This also happened several days ago and then started working again – on it’s own as far as I can tell.

Config details:

  • Installed on a brand new RPi 5, 8GB RAM, 128GB SD, 45W power supply
  • Home Assistant Core v2025.1.4
  • Followed the on the web site to install the HA OS on the SD card. I’d provide a link to the page but as a new user I’m limited to 2 links :frowning:

Later: I rebooted my Mac. I can now access the homeassistant.local page from my usual browser. Coincidence? Something else going on?

2

Try with http://your ha ip:8123

3

Thanks for the suggestion, @fleskefjes. I did try that previously and it made no difference.

I just updated my post to say that I rebooted my Mac and now it’s working again. Is that just coincidence?

4

Can you ping the ip when it’s not responding to your browser? Have you checked the logs?

5

I would expect the ping to succeed since other browsers are succeeding in connecting. I’ll try that if it stops working with my primary browser again.

Is there a way to check the logs without connecting a monitor and keyboard to the RPi?

6

Yes, use the browser that is working.

7

I see the “Logbook” page in the browser. Is there a way to see the lower-level HAOS logs without a monitor and keyboard attached?

8

Settings → System → Logs or use a file explorer addon to view the log files under /config/home-assistant.log and home-assistant.log.1

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9

Settings → System → Logs has one entry:

Logger: homeassistant.bootstrap
Source: bootstrap.py:741
First occurred: 10:50:56 AM (2 occurrences)
Last logged: 10:51:56 AM

Waiting on integrations to complete setup: {('upnp', '01JK8MV68FY9Z3VZ4BQGRE2TYW'): 137273.147333827}

This corresponds to when I was restarting HA, so I don’t think it’s relevant.

Looking at the raw logs, starting with the first entry for the day until now:

2025-02-07 02:53:47.645 ERROR (Thread-4) [pychromecast.socket_client] [Attic TV(192.168.1.6):8009] Failed to connect to service HostServiceInfo(host='192.168.1.6', port=8009), retrying in 5.0s
s6-rc: info: service legacy-services: stopping
[15:49:50] INFO: Home Assistant Core finish process exit code 0
[15:49:50] INFO: Home Assistant Core service shutdown
s6-rc: info: service legacy-services successfully stopped
s6-rc: info: service legacy-cont-init: stopping
s6-rc: info: service legacy-cont-init successfully stopped
s6-rc: info: service fix-attrs: stopping
s6-rc: info: service fix-attrs successfully stopped
s6-rc: info: service s6rc-oneshot-runner: stopping
s6-rc: info: service s6rc-oneshot-runner successfully stopped
s6-rc: info: service s6rc-oneshot-runner: starting
s6-rc: info: service s6rc-oneshot-runner successfully started
s6-rc: info: service fix-attrs: starting
s6-rc: info: service fix-attrs successfully started
s6-rc: info: service legacy-cont-init: starting
s6-rc: info: service legacy-cont-init successfully started
s6-rc: info: service legacy-services: starting
services-up: info: copying legacy longrun home-assistant (no readiness notification)
s6-rc: info: service legacy-services successfully started
2025-02-07 10:50:56.588 WARNING (MainThread) [homeassistant.bootstrap] Waiting on integrations to complete setup: {('upnp', '01JK8MV68FY9Z3VZ4BQGRE2TYW'): 137273.147333827}
2025-02-07 10:51:56.636 WARNING (MainThread) [homeassistant.bootstrap] Waiting on integrations to complete setup: {('upnp', '01JK8MV68FY9Z3VZ4BQGRE2TYW'): 137273.147333827}
 Live

As far as I can tell, except for the first 2 or 3 lines (which don’t appear to be related to my browser issue) these log entries are all related to restarting HA. After restart, Safari and Firefox continued to connect successfully; Arc did not.

10

I have no experience with Arc, but since it’s working on other browsers, is responding to ping and so on I’d look into the browser settings.

11

I have no experience with Arc, but I see it’s based on Chromium. Most Chromium based browsers have a “Developer Tools” option which shows great troubleshooting details on the Network tab. Try it on pages that give you problems and it will likely reveal some important clues.