I had a setup with 4 fixed workspaces and it was working fine up until now but the setting is not correct anymore. It seems I have a dynamic workspace again with 1 workspace.
The following commands do not change anything.
gsettings set org.pantheon.desktop.gala.behavior dynamic-workspaces false
gsettings set org.gnome.desktop.wm.preferences num-workspaces 4
Is there another way of fixing the number of workspace to 4?