This is still an issue in Ubuntu 18.04. Here's the output of the command you asked for:
$ gio ls network:/// Usage: gio COMMAND [ARGS...] etc ** Changed in: nautilus (Ubuntu) Status: Incomplete => New -- You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to nautilus in Ubuntu. https://bugs.launchpad.net/bugs/1646403 Title: Error message when clicking "Windows Network" needs to be improved To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/nautilus/+bug/1646403/+subscriptions -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs