When you first connected, did you get an error message about not being able to get the JSON or something like that?
If you just disconnect and reconnect then the IDE will be able to get the firmware version and it'll all work fine
@Gordon started
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.
When you first connected, did you get an error message about not being able to get the JSON or something like that?
If you just disconnect and reconnect then the IDE will be able to get the firmware version and it'll all work fine