There are no interfaces on which a capture can be done

Open a terminal by pressing Ctrl+Alt+T and type the following commands:

sudo dpkg-reconfigure wireshark-common

press the right arrow and enter for yes

sudo chmod +x /usr/bin/dumpcap

you should now be able to run it without root and you will be able to capture.

The "No interface can be used for capturing in this system with the current configuration" message commonly appears when you don't have the privileges to access the network interfaces for monitoring. Try opening a terminal and running gksudo wireshark. If several network interfaces appear, it's because when you run wireshark without root permissions you don't have the privileges to monitor.

To fix that, run the following command in a terminal:

sudo setcap CAP_NET_RAW,CAP_NET_ADMIN,CAP_DAC_OVERRIDE+eip /usr/bin/dumpcap