V13 install broken - please help

Update …

I performed the install as you suggested @HUMENTH … a few hickups… (V13)

Step 17 I had an error which I fixed with
sudo apt install python3.8-venv

Rest of install went fine.

When I accessed the site via the registered URL, I got the heart-breaking …
Sorry !!! We will be back soon. … message.
Another symptom was that …
sudo supervisorctl status
returned nothing.

Fixed it after googling a post on thie forum:

So my test-site is up and running. Just busy going through all the modules to get a feel
if everything is working fine.