SOLVED:
I've opened an issue on githup: https://github.com/espruino/Espruino/issues/1804
From version 2.01 on the board running with 160 MHz clock are no more supported by Espruino, and this is the case of my board.
@Sdellava 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.
SOLVED:
I've opened an issue on githup: https://github.com/espruino/Espruino/issues/1804
From version 2.01 on the board running with 160 MHz clock are no more supported by Espruino, and this is the case of my board.