Hi,
this message is from the USB core, some (internal, I guess) USB hub just is non-spec-compliant (-110 is ETIMEOUT
IIRC, not to uncommon on consumer hardware). But nothing to worry about in general, it's most likely spurios and does not indicate anything or have to do anything with the web UI not being reachable (except maybe your machine is connected via a USB<->ethernet adapter?).
Please provide the output of pveversion -v
, ip a
and cat /etc/network/interfaces
to help troubleshoot this further.