Can you just load or copy the file into the right hand side and upload from there?
It seems like you may have hit https://www.espruino.com/Troubleshooting#i-ve-pasted-code-into-the-left-hand-side-of-the-web-ide-and-it-doesn-t-work
@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.
Can you just load or copy the file into the right hand side and upload from there?
It seems like you may have hit https://www.espruino.com/Troubleshooting#i-ve-pasted-code-into-the-left-hand-side-of-the-web-ide-and-it-doesn-t-work