Emby initial screen has no info only logo.

[GlenManor 0]

After years of successful use of Emby, suddenly Emby initial screen has no info. Screen is black with Emby logo in center (http://localhost:8096/web/index.html). No menu. Nothing. Emby icon in system tray offers 'Browse Emby Library", etc. Selecting "Browse Emby.." bring up a duplicate of the previous screen. "Configure Emby" does the same thing.

I'm using latest available Emby install; latest Windows 11 update. Processor: AMD Ryzen 5 3550H with Radeon Vega Mobile Gfx (2.10 GHz) RAM: 16GB.

Oddly, everything I expect to see is available elsewhere on the network and even offsite on my laptop and a smart TV using Emby app. So the server is obviously running but not showing me anything on the actual PC running the server.

What an I missing?

[Happy to send logs and more detailed system info, if needed.]