In sencha-io-debug.js (most recent version), there are two typos in forEachValueCS() that cause the following error:
Code:Uncaught TypeError: Object function () { return this.constructor.apply(this, arguments); } has no method 'wraning'
[Lines 6071 & 6072)
I believe the syntax should be Ext.cf.util.Logger.warn.
In looking back at previous versions, I believe it was present there as well.