Are you trying to connect to the Web IDE relay? Normally be connecting directly via Web Bluetooth.
If you're using the relay though it could just be that the other device (the one you're using as a relay) isn't connected
Now the error is gone, but I didn't change anything. Except trying to login directly without a relay. Hmm.
@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.
Are you trying to connect to the Web IDE relay? Normally be connecting directly via Web Bluetooth.
If you're using the relay though it could just be that the other device (the one you're using as a relay) isn't connected