No Koreader books shown using Wifi connection

I run Koreader last version (2024.07) on my Onix Leaf2 Android device.
When I connect it via USB cable to Calibre on my PC - there's no problem.
When I connect it to Calibre via Wifi, the books on my device don't show up in Calibre.
The connection itself is Ok - both Koreader and Calibre show they are connected.
Pls refer to the Calibre log attached.

Attached Files

Calibre_Koreader_WifiConn_NoBooksShown_DBG_LOG.txt (35.2 KB)