Hi Alain and Sisqonrw,
The screen capture say :
"Installation step failed
Part of the installation failed. You can try to access this step again from the menu or skip it and choose a different one. Failed : Install the system"
This type of information does not allow us to find a solution.
You should know on which computer this installation is made, and if the computer is in BIOS, UEFI, Secure Boot mode?
Sisqonrw, you can also try the installation with Camalares which is much simpler:
https://emmabuntus.org/installer-emmabuntus-debian-edition-4/#Linstalleur_Calamares