Thanks @Techman,
I went through the links, looking for differences. Can't seem to get it to work.
Like I said, once I try to launch the AC LAN from within IoX Launcher, it thinks for a while and then the icon of the IoX Admin Console appears in the task bar. when I hover over it I see the name in the title bar and a white panel. There is a single line in that white panel, but it is too small to read. When I hover over the white area, all open windows on my screens disappear. This is normal behavior in Win11, except that the only the affected window should show... which makes me think that the program is running, but not displaying...