For those who won't get a desktop environment when selecting the "System Default", try the following on a terminal and reboot: gsettings set org.gnome.desktop.session session-name 'gnome'
After that, selecting System Default works and solves this bug.
For those who won't get a desktop environment when selecting the "System Default", try the following on a terminal and reboot: gsettings set org.gnome. desktop. session session-name 'gnome'
After that, selecting System Default works and solves this bug.