Also, just to add you can try the IDE relay out on the same PC. Click the Remote Connection text in one browser window, then copy the URL into another browser window. It'd be interesting to see if it works.
... or what happens if you scan the QR code with your phone (so not using Gadgetbridge but just chrome on your phone)
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.
Also, just to add you can try the IDE relay out on the same PC. Click the
Remote Connection
text in one browser window, then copy the URL into another browser window. It'd be interesting to see if it works.... or what happens if you scan the QR code with your phone (so not using Gadgetbridge but just chrome on your phone)