Not able to play iTunes to RoPieee

@spockfish_sf Perhaps I should have directed this in your direction? I have RoPieeeXL 2023.02.1 (0759) installed on a Raspberry Pi 4 Model B Rev 1.4. I am running iTunes Version 12.12.8.2 on a Windows 11 machine. When I tick the RoPieeeXL “tick box” on the iTunes Speaker Choice:

I receive the following message box:

Does this mean that I can not “cast” iTunes to my RoPieee devices?