Updating and Installation issues on RPi

Had a quick look at the updating topics but nothing useful so far.

I installed a version on an RPi 3B back in 2021 for a specific use with Node Red and Owl heating systems. That was fine, if a learning experience but once done, didn’t need to use again until I got some shelly devices a couple of days ago.

So, fired up Pi, headed into supervisor area to see if there were any updates. Unsurprisingly there were 2. 1 for supervisor (On 2021.10.8, sowing update to 2023.03.1) and 1 for core (On 2021.11.4 showing update to 2023.3.4).

Tried updating both and get error messages:

Supervisor:
“Update failed” Abort update because of an issue with AppArmor: Can’t fetch AppArmor profile https://version.home-assistant.io/apparmor.txt: Cannot connect to host version.home-assistant.io:443 ssl:default [Try again]

…and once I got
Update of Supervisor failed: Can’t install ghcr.io/home-assistant/armv7-hassio-supervisor:2023.03.1: 500 Server Error for http+docker://localhost/v1.41/images/create?tag=2023.03.1&fromImage=ghcr.io%2Fhome-assistant%2Farmv7-hassio-supervisor: Internal Server Error (“Get “https://ghcr.io/v2/”: net/http: TLS handshake timeout”)

Core:
HomeAssistantCore.update’ blocked from execution, system is not healthy, from which I can only cancel.

A few posts suggest network issues, but there’s nothing obvious, and as it was a “simple” install at the time I have no access to the underlying OS to look at network configuration - at least not that I can find.

So, I thought sod it, I’ll just do a fresh install.
following simple option again I got to using Balena on my Windows PC, install from URL only to get:

Something went wrong if it’s compressed … pages of non-copyable script in a small window.

So, Balena is fetching stuff from the network (otherwise it never gets to select drive and Flash) but it’s screwing up too.

Any pointers on either of these - just want to get something up and running but the ready-packed options aren’t doing it here…

Thanks.