Failed to start LSB: Bring up/down networking

I'm getting this FAILED message at log-out or shut down:
The message flashes by too quickly to read.
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[ OK ] Started Network Manager.
Starting LSB: Bring up/down networking...
Starting Network Manager Wait Online...
[FAILED] Failed to start LSB: Bring up/down networking.
See 'systemctl status network.service' for details.
Starting LSB: Wait for the hotplugged network to be up...
The message flashes by too quickly to read.