Have you checked your USB cable? Maybe try plugging in direct?
That kind of thing usually happens if power is making it to the Pico, but one or both of the USB data pins aren't making contact.
@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.
Have you checked your USB cable? Maybe try plugging in direct?
That kind of thing usually happens if power is making it to the Pico, but one or both of the USB data pins aren't making contact.