Plex HTPC Screensaver not working

Hi, I have just built a new HTPC - Windows 11 Pro, Intel i3-12100f, Nvidia RTX3050.

All going okay, but the Plex HTPC screensaver isn’t kicking in. I have set it to 1 minute and Entertainment. Version 1.37.3.3706.

Is this a known issue?

Thanks!

Appears so