I am seeing this issue as well.
I have two networks that are both configured to join a VPN, and when
both networks (wifi and wired) are activated simultaneously, I see a
message:
Aug 21 15:45:58 example NetworkManager[1196]: <warn>
[1534823158.7630] policy: secondary connection 'Example
(12345678-1234-1234-1234-1234567890ab)' auto-activation failed: (6)
Connection 'Example' is already active
So - the fix for me is to disable (manually, currently) the wifi when my
laptop is docked; this seems to allow the VPN to connect on the (sole
remaining) network connection.
Posting in the hope this might help others, and to follow along with
this issue :)
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https://bugs.launchpad.net/bugs/1767322
Title:
"Activation of network connection failed" popup shows incessantly
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