Guys...I got this problem solved by running these commands...
Install WICD to manage the network
sudo apt-get install wicd-gtk
Stop and disable Network-Manager
sudo systemctl stop NetworkManager.service
sudo systemctl disable NetworkManager.service
and uninstall avahi-autoipd and isc-dhcp-clie
$ sudo journalctl -b -p err
-- Logs begin at Sex 2017-09-29 07:50:42 BRT, end at Sex 2017-09-29 07:58:58
BRT. --
Set 29 07:51:03 DTI05 NetworkManager[907]: nm_device_get_device_type: assertion
'NM_IS_DEVICE (self)' failed
Same error. My computer has no wireless card connected. I've tried a lot
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