Network-Manager restart fails

[Clawinus]

helmut@helmut-HP-ENVY-Desktop ~ $ sudo restart network-manager
restart: Unable to connect to Upstart: Failed to connect to socket /com/ubuntu/upstart: Connection refused

The restart command give the preceding error message.
How do I fix that?

[DAMIEN1307]

try the code below...DAMIEN

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sudo systemctl enable NetworkManager.service

and then:

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sudo systemctl start NetworkManager.service

and then reboot and see if that doesnt correct your problem.