How to trouble shoot strange bhavior (not starting, pages not loading)

Installation
1

Hi!

Unfortunately, my Home Assistant started behaving very strange yesterday morning:

It was not reachable via browser. I went ahead and connected it to a screen. I saw the error was Error returned from Supervisor: System is not ready with state: setup and typed “banner” for trouble shooting (Error returned from Supervisor: System is not ready with state: setup)

It worked until today. Now the HA settings page in the browser won’t load “Error while loading page config.” (switching browser does not solve the issue)

Any ideas what I could do?

I suspect the microSD card in my RaspberryPi but would like to run a diagnosis before buying a new one (is there a way to do this from within Home Assistant?)

Thank you!

2

…it seems like my microSD card had a flaw indeed. After switching it the system runs much faster.

However, I had to empty the cache on all of my devices, too. The error seemed have to “burned in” for the settings page.