No instruments listed in Halion Sonic SE3

For some reason, when I try to Load Multi-Program in Halion Sonic SE3, no instruments appear on the screen. This has not always been the case, so I am not sure why it is a problem now…

I’ve never tried to do that before, but I can reproduce it here on 12.0.50. If you click on the “rescan disk” button, for a short time some presets appear in the window, but they vanish again before one is able to select one.