OK---I found the problem! In the integration settings tab I changed theme from "Autodetect" to "Radiance" and now everything works.
So the issue is that having the theme on "Autodetect" causes the wallpaper not to change for some reason.
OK---I found the problem! In the integration settings tab I changed theme from "Autodetect" to "Radiance" and now everything works.
So the issue is that having the theme on "Autodetect" causes the wallpaper not to change for some reason.