I want to install Debian over an existing Debian install with an existing home partition in an encrypted lvm (to upgrade to testing), and I have been practising in a vm.

After trying to follow the advice on https://www.blakehartshorn.com/installing-debian-on-existing-encrypted-lvm/, I successfully reached the end of the installation, but when I try to boot into my system, I get the error(s) shown in the attached screenshot.

Any idea what I did wrong/need to do?

Edit: "sgx: There are zero EPC sections" is something that displayes when booting successfully into a machine that works too.