HA SUPERVISED as docker - cannot install any Add-on

I have just installed Home assistant Supervised as a docker on my Ubuntu server 20.04.2 LTS . This tutorial was used for installation - architecture/0014-home-assistant-supervised.md at dc0b0c7cfe355ab87abe7854db3999309ba1f5d7 · home-assistant/architecture · GitHub

Installation was successful and I can log in to Home Assistant. But when I tried to install any addon and I clicked the Install button, nothing happens.
core-2021.4.6 - installed

I see 2 issues in the System tab.

  1. You are running an unsupported installation.
  2. Your installation is unhealthy.

Can you please help me to fix the problems?
Thank you.

I see this error message in log

21-04-25 13:30:52 WARNING (MainThread) [supervisor.jobs] 'ResolutionFixup.run_autofix' blocked from execution, system is not healthy

Thank you for an answer.

You didn’t follow it completely because it specifies using Debian and no other distribution of Linux. Only Debian is officially supported and explains why you are seeing:

You are running an unsupported installation.

The other message (“unhealthy”) may be due to the version of Docker or Network Manager that is installed in Ubuntu (or a permissions problem where Supervisor doesn’t have full control). If you click the “unhealthy” link it will lead you to more information.

At this early stage, you are better off re-installing on Debian.

Exactly as Taras said

Only way to fix the unsupported message is to change the OS you installed it on.

Your biggest problem is the unhealthy message though. Without fixing that one, you won’t be able to update.

Thank you for your answers.
Ok, I understand about the Debian server, but I cannot install it because all other stuff is already running on my Ubuntu server.

I just need to fix how to enable updating. Is it possible or not in the Ubuntu server?
Unhealthy status = There is a message:
The Docker environment is not working properly.

My docker version
docker -v
Docker version 20.10.6, build 370c289

When I checked logs:
WARNING (MainThread) [supervisor.jobs] ‘ResolutionFixup.run_autofix’ blocked from execution, system is not healthy.
Thank you for your answer.

That’s not a reason you cannot, that’s a choice you’ve made.

Try downgrading docker to version 20.10.5. I have that, on Debian, and it isn’t causing an “unhealthy” message.