Why wireshark does not see the interface?

Installed wireshark.
When you install the question Should non-superusers be able to capture packets? answered YES.
Added user which is logged in to the group command adduser John sudo wireshark

Start wireshark - it sees no interfaces. If I run this from the console with sudo, you see.

Ubuntu 16.04
June 10th 19 at 14:32
1 answer
June 10th 19 at 14:34
If not rebooted after that, then at least log out and log in again. Prior to this change in user groups will not take effect.

Find more questions by tags WiresharkUbuntuLinux