@radi - Sorry I didn't see this sooner.
If you want to use TCP/IP to read an adapter. The remote host with the RTL-SDR dongle must be running rtl_sdr (rtl_tcp is included with the dist). Then on that host you would run the command:
rtl_tcp -a hostname -I <ip address>
On your ioBroker server you will need to run rtl_433 (which also requires rtl_sdr) and configure the instance with the ip address. You can take ioBroker out of the picture for testing and run the command:
rtl_433 -F json -d rtl_tcp://<ip address>:1234
In each case the <ip address> would be the address of the host with the RTL-SDR dongle - presumably 192.168.69.140
From the looks of the log provided rtl_433 is not installed on the ioBroker host yet