Getting ‘No carrier’ with connman on Ubuntu 17.04

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I’m using connman 1.33 on Ubuntu 17.04.

I’ve just installed it by running sudo apt install connman. This command also removes NetworkManager.
Right after installing, I was able to connect to my WPA2 protected wifi network and get an IP address by running:

connmanctl
> scan wifi
> services
> agent on
> connect wifi_<hash>

This was 3 minutes ago. I then rebooted, and executed the commands again.

Now, connmanctl shows me an error after entering scan wifi:

Error /net/connman/technology/wifi: No carrier

How can I resolve this problem?

Answer

Attribution
Source : Link , Question Author : Exeleration-G , Answer Author : Community

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