Did you disconnect and reconnect? What you're seeing is because the IDE is not able to communicate with Espruino - that could either be some communication issue, or it might be that Espruino isn't running on your ESP8266 at all!
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.
Did you disconnect and reconnect? What you're seeing is because the IDE is not able to communicate with Espruino - that could either be some communication issue, or it might be that Espruino isn't running on your ESP8266 at all!