Starting from 0.31.0 the standard xod/common-hardware/button uses built-in pull up resistor. And for the simulation mode, the INPUT_PULLUP is not defined. That’s a bug. Will fix it in several hours… I hope so.
Looks like your web browser does not have a TextEncoder object, that are used in simulation.
Can you tell which browser do you use and what is the version?
Yep, Microsoft Edge does not support it, so we need to fix it.
But we have some other issues with IDE on Microsoft Edge, including very slow rendering.
So I’m not sure that we’ll fix it soon and recommend to use one of these browsers: Chrome / Chromium / Firefox or download the desktop version