ubuntuは、システムのネットワークサービスがこのバージョンのネットワークマネージャーと互換性がないことを示します。

Ubuntu Indicates That Network Service System Is Not Compatible With This Version Network Manager

Googleで見つかった解決策：

Log in to the root user to operate the following commands root@xxxxx:/etc/NetworkManager$ su Enter the following directory root@xxxxx:/etc/NetworkManager# cd /etc/NetworkManager/system-connections/ View the file directory root@xxxxx:/etc/NetworkManager# ls -la Move your files to another directory root@xxxxx:/etc/NetworkManager# mv /home// #here filename is system-connections and username is your username Execute the following command to restart the network root@xxxxx:/etc/NetworkManager# NetworkManager

それで解決しましたO（∩_∩）Oはは〜