Wow.. so somehow this shim was causing you problems.. I wonder what happened to break it in your case?
Did formatting and starting over solve your issue?
And what media did you use to reinstall?
Yup, the problems that we had looked exactly like someone using a shim to proxy data somewhere else (aka a man in the middle attack.) Most man in the middles will break socket.io that MangoLassi uses. This is the same thing that used to cause Untangle and Watchguard devices to break.
Formatting and installing a non-Lenovo Windows 10 image fixed things.