Unsubscribe does not work due to JavaScript error

https://pc2.mypreferences.com/Comcast/OptDown/opt-down/#

The link provided does not allow you to unsubscribe at all. The following javascript error comes up in console:

```
angular.js:14642 TypeError: ga.getAll is not a function
at triggerGAEvent (mainController.js:40)
at Object.vm.unsubscribeAll (mainController.js:56)
at fn (eval at compile (angular.js:15500), :2:170)
at e (angular.js:27285)
at m.$eval (angular.js:18372)
at m.$apply (angular.js:18472)
at HTMLParagraphElement. (angular.js:27290)
at kg (angular.js:3771)
at HTMLParagraphElement.d (angular.js:3759)
```