@carteblanche searching out there I’ve seen this. It seems that google has shut down the Chrome Speech API for use in shell environments like Electron. You can try starting MM2 in chromium browser. I have the same error but when I started on chromium the error disappears.

A “dirty” workaround is start MM2 in server mode:

node servonly

and later start chromium in kiosk mode.

chromium --noerrdialogs --kiosk 127.0.0.1:8080

i’ll keep on searching…