Official Add-ons fail to install on HAOS (Proxmox), but Custom Repos work

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Hello people o/ First, thanks for the amazing product and for all the support here. It definitely helps a lot.

The Problem: I am running HAOS on Proxmox and facing a strange issue where I cannot install any official add-ons from the store. However, installing add-ons from third-party GitHub repositories works perfectly fine. When I try to install an official add-on, it just hangs or fails.

Environment:

  • OS: Home Assistant OS (HAOS) running on Proxmox
  • Installation Method: Proxmox VE Helper Scripts (tteck)
  • Network: Pi-hole with Unbound (DNS)

What I have tried so far:

  • Reinstallation: I have completely reinstalled the VM a couple of times, but the issue persists.
  • Updates: Updated HAOS and Core to the latest versions.
  • DNS & Pi-hole: I verified HAOS DNS settings were correct. I also tried changing the DNS inside the containers manually and completely disabled Pi-hole to rule it out, but neither worked.
  • MTU: I read about potential MTU issues with Proxmox/HAOS networking and applied the recommended MTU fix, but it didn’t solve the problem.

Has anyone experienced this specific split behavior where only official add-ons fail? Any pointers on what to check next would be appreciated. Thanks in advance ^^

Screenshot 2026-02-05 205929
Screenshot 2026-02-05 2059291291×297 98.6 KB

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They are no longer add-ons. They are now called apps. Is this affecting things, not sure in your case…

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proxmox version 9.x.x?
proxmox container: firewall?

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@Sir_Goodenough sorry, indeed, it is called apps now. But I don’t see in the logs any error related to naming, at least, not in the supervisor log.

@Kjoere Proxmox 9.1.4. No firewall enabled in the virtual machine.

5

Just a quick update. I did a full fresh install, manually installing it using the image direct from the website, creating the VM myself and all manually… And, everything worked so far. I tried to go through the script from Proxmox Community Helper Script, but it is huge, and did not find anything weird there. Gonna comeback here after more testing. Thanks

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At the end, manually installing it solved the issues for me and I did not have any more DNS problem. I even rollback all my previous changes in Pi-Hole+Unbound and still works as supposed to.

SOLUTION: manually install HAOS, instead of Proxmox Helper Scripts installation.