Starting server for the first time on Raspberry Pi throws java.io.IOException error

[Rouquemoute]

Simon,

It's a Raspberry Pi 4.
A VPN client is running on it, which is most likely the source of the problem

> /sbin/ip route get 8.8.8.8
8.8.8.8 via 10.8.1.1 dev tun0 src 10.8.1.7 uid 1000
cache
> cat /proc/net/route
Iface Destination Gateway Flags RefCnt Use Metric Mask MTU Window IRTT
tun0 00000000 0101080A 0003 0 0 0 00000080 0 0 0
eth0 00000000 0101A8C0 0003 0 0 202 00000000 0 0 0
tun0 0001080A 00000000 0001 0 0 0 00FFFFFF 0 0 0
tun0 00000080 0101080A 0003 0 0 0 00000080 0 0 0
eth0 731980B9 0101A8C0 0007 0 0 0 FFFFFFFF 0 0 0
eth0 0001A8C0 00000000 0001 0 0 202 00FFFFFF 0 0 0