I had the same problem, and comment [#4][https://bugs.launchpad.net/ubuntu/+source/network-manager/+bug/1104476/comments/4] in this thread worked for me!
I had the same problem, and comment [#4][https:/ /bugs.launchpad .net/ubuntu/ +source/ network- manager/ +bug/1104476/ comments/ 4] in this thread worked for me!