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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.
@Gordon
Try
espruino-web-ide --dbg- I think this should give you a debugger window on the right-hand side where you can see errors reported.I'd be 99% certain it's saying something like
can't find serialport v47- it's what happens when the version of node (node --version) doesn't match the version of electron, so the compiled libraries installed by npm don't work.Sadly it seems to be a major problem with both nw.js and electron, but it's usually just fixed by upgrading node.js