A day or two after the last update, my HAOS all of a sudden threw out a load of errors and developed all kinds of connectivity issues. There was so much going on I used a backup which solved almost all the issues, but have an ongoing issue with the Supervisor I just cant figure out.
It seems to be OK half the time, but the other half it's throwing up loads of errors about being unable to connect to the core websocket as the API is unreachable, aiohttp parser errors and although the supervisor is running when I try to open the supervisor dashboard I get a http 401 error. The core logs are also throwing up a load of Python 3.14 about aio http.
I haven't changed my network config at all, so slightly baffled by it all - I checked, double checked and reset various network configs but nothing seems to be working...
Do any of you guys far cleverer than me have any ideas?
I run HA OS on a mini PC.
I use Tailscale and NextDNS - Tailscale for the secure access and then have my NextDNS endpoint set up in the online Tailscale portal as a name server with my profile ID so I can see what traffic comes from HA
Well NextDNS is probably blocking stuff you need. It is the same type of DNS man-in-the-middle DNS diverter that the others I mentioned are.
Maybe let HA manage it's own DNS needed and sent it's data thru 1.1.1.1 cloudflare or something else?
I've run that setup for well over a year with absolutely no problem at all. From the sudden onset of my recent issues following the recent update release I am guessing it's likely something went awry during that process rather than NextDNS blocking anything
All problems are name resolution issues until proven otherwise.
(read: I'd strongly suggest trying what SirG mentioned.. It's a solid recommendation. DNS is the FIRST thing to look at when this happens and it does exactly what is described)
I see exactly the same right after today's upgrade from 2026.5.3 to 2026.6.1. Nothing changed in my home network, no external DNS services in use (I'm a paranoid and a DNS engineer myself so I swear my internal DNS work fine :). The errors surface when I connect from an internal host so no VPNs/tunnels/extental things could be a reason. The errors look like:
Did you manage to find the root cause / a solution?
I managed to get mine mostly functional but it still chucks out loads of 401 errors plus a plethora of other connectivity related errors like API connection failures from integrations polling for updates yet somehow for the most part everything seems to work albeit with regular reboots.
