... except, you also have "This site overrides Array.from() with an implementation that doesn't support iterables, which could cause Google Maps JavaScript API v3 to not work correctly."
Now, this could (could! = I'm not the one to confirm) be down to an incompatibility of Google Maps API v3 and Mootools (and generate the API warning). In that case, it would involve Fabrik, indeed. However, Fabrik relies on Mootools...
Is there a MooTools version issue? Is that something I could update? (Need to buy a Java for dummies book)