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
Solution
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