Whenever connecting fails we are not too good at communicating the reason; whether DHCP timed out, not able to configure LL address, bad VPN password, etc.
Let's see what can be done about this.
Went in upstream: https://bugzilla.gnome.org/show_bug.cgi?id=779627
[root@belphegor NetworkManager]# nmcli c add type wifi ssid trolofon ifname '*' con-name lala
Connection 'lala' (ddee22a6-0e20-4f0a-9bd2-735de094ad62) successfully added.
[root@belphegor NetworkManager]# nmcli c up lala
Error: Connection activation failed: The Wi-Fi network could not be found
You would get a "Error: Connection activation failed." before.
All errors do show as before and some of them are even better.
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.
For information on the advisory, and where to find the updated
files, follow the link below.
If the solution does not work for you, open a new bug report.