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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.
@RicardoN
Was able to resolve this. I had forked the app loader a few weeks ago. Ran it, and was able to upload default apps to my watch.
So issue appears to be with banglejs.com app loader (I think).