Custom Multi Home Background Images not working OpenPHT 1.6.2

I cannot get “Custom Multi Home Background Images” working on OpenPHT 1.6.2. All I get is a black screen.

Custom Single Home Background Image works fine but not multi.

Unfortunately Im having the same issue…anyone an idea how to fix that?

Now that I switched back to the default OpenPHT skin (which I never use), I now realize this is a Plex Black Edition skin issue.