in static/js/tracker.js [2189:2199]
e.exports = function (e, n) {
if (!r(e)) return e;
var t, o;
if (n && 'function' == typeof (t = e.toString) && !r((o = t.call(e))))
return o;
if ('function' == typeof (t = e.valueOf) && !r((o = t.call(e))))
return o;
if (!n && 'function' == typeof (t = e.toString) && !r((o = t.call(e))))
return o;
throw TypeError("Can't convert object to primitive value");
};