I naively upgraded my HA core installation on my Mac Mini to the latest version 2023.9.1 and now the web site just reloads an onboarding URL instead of Lovelace. I tried downgrading to 2023.6.1 but the problem persists.
a) HALP!
b) Tried going VirtualBox instead, but how do I get my old configuration in there - I have no formal HA-backup, can I create a backup manually from files in some manner? Also, how do I ssh into the VirtualBox installation - there is no Supervisor in the .vdi-installation linked at MacOS - Home Assistant . I need to install custom integrations, including a manual hack to get two SolarEdge Modbus installations.