probert crashed with AttributeError in probe(): 'NetworkInfo' object has no attribute 'ip'

Running probert on cosmic

$ probert
Traceback (most recent call last):
  File "/usr/bin/probert", line 62, in <module>
    main()
  File "/usr/bin/probert", line 56, in main
    p.probe()
  File "/usr/lib/python3/dist-packages/probert/prober.py", line 41, in probe
    getattr(self, fn)()
  File "/usr/lib/python3/dist-packages/probert/prober.py", line 45, in probe_all
    fn()
  File "/usr/lib/python3/dist-packages/probert/prober.py", line 54, in probe_network
    results = network.probe()
  File "/usr/lib/python3/dist-packages/probert/network.py", line 332, in probe
    'ip' : l.ip,
AttributeError: 'NetworkInfo' object has no attribute 'ip'

ProblemType: Crash
DistroRelease: Ubuntu 18.10
Package: probert 0.0.14.1build3
ProcVersionSignature: Ubuntu 4.17.0-6.7-generic 4.17.9
Uname: Linux 4.17.0-6-generic x86_64
ApportVersion: 2.20.10-0ubuntu9
Architecture: amd64
CurrentDesktop: ubuntu:GNOME
Date: Tue Sep 4 09:59:08 2018
ExecutablePath: /usr/share/probert/bin/probert
InstallationDate: Installed on 2014-07-15 (1511 days ago)
InstallationMedia: Ubuntu 14.10 "Utopic Unicorn" - Alpha amd64 (20140520)
InterpreterPath: /usr/bin/python3.6
ProcCmdline: /usr/bin/python3 /usr/bin/probert
Python3Details: /usr/bin/python3.6, Python 3.6.6+, python3-minimal, 3.6.6-1
PythonArgs: ['/usr/bin/probert']
PythonDetails: /usr/bin/python2.7, Python 2.7.15, python-minimal, 2.7.15-3
SourcePackage: probert
Title: probert crashed with AttributeError in probe(): 'NetworkInfo' object has no attribute 'ip'
UpgradeStatus: Upgraded to cosmic on 2018-03-24 (163 days ago)
UserGroups: adm cdrom dip docker kvm libvirt libvirtd lpadmin lxd plugdev sambashare sudo