Why is pinch/zoom disabled?

[Flurrywinde]

In a mobile browser, pinching and zooming doesn't work, due to <meta name = "viewport" content = "width = device-width, initial-scale = 1.0, maximum-scale = 1.0"> in index.html. If I change this to allow pinching and zooming, it works, but after a few seconds, I get a popup saying there's a typeerror: cannot read property disconnect of null.

Is there a way to get pinching and zooming to work?