Dude, just zoom out using volume buttons and you' will see the all screen. Then tap Deauthenticate on cleven and, if you have been near from AP, and if there are someone connected with AP (like i can see on your 2nd screenshot) you will see the handshake notification at the right upper corner. If you can't get a handshake using deauthenticate button, just try a more especific command on terminal, just like you've read.

Edit: language error... just one of all them...

Edit 2: how about we move our a*s to this thread ?