Have you tried just typing something in on the left of the WebIDE? While there is rubbish being sent it looks like there are communications with Espruino and it is responding.
The web ide saying 'sent' isn't necessarily a problem...
Espruino is a JavaScript interpreter for low-power Microcontrollers. This site is both a support community for Espruino and a place to share what you are working on.
Have you tried just typing something in on the left of the WebIDE? While there is rubbish being sent it looks like there are communications with Espruino and it is responding.
The web ide saying 'sent' isn't necessarily a problem...