Comment # 4 on bug 1208918 from Freek de Kruijf

(In reply to Stefan Hundhammer from comment #3)
> So, did you check the SHA256 sum of that ISO?
> 
> You also didn't even write what ISO you used.

No, I have it on a USB stick together with Ventoy. So I select that iso image
using Ventoy to start the installation.
I also have the .sha256 file of that image on the stick and cd to the folder
with the .iso and the .sha256 on the stick and do "sha256sum -c
<.sha256-file>", which returns "good".