I am trying to debug a Google Pixel Watch via Wireless LAN and get this:

adb pair XX.XX.XX.XX:XXXX
Enter pairing code: XXXXX
error: protocol fault (couldn't read status message): Success

It does not matter if I enter the correct or a wrong pairing code. Both devices are in the same LAN. I can even ping the Google Pixel Watch.

This is my adb version on Ubuntu Linux:

Android Debug Bridge version 1.0.41
Version 35.0.2-12147458

I would rather prefer USB debugging but as far as I know the USB cable is only for power and not data transfer?