Web IDE should download HD44780 from Espruino.com/modules and send to the board. Is your connection to internet running ?
@JumJum 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.
Web IDE should download HD44780 from Espruino.com/modules and send to the board.
Is your connection to internet running ?