We are setting up an Umbraco 8 solution and are attempting to use the FAQ Listing package

https://our.umbraco.com/packages/website-utilities/faq-listing/

However when we try to use it there is an error thrown (404) on the urls umbraco/tags and umbraco/rte

When I step through the angular code I can see it is falling over on

$scope.rteProperties.push(newRteProperty); 

and

$scope.tagProperties.push(newTagProperty);

I tried a static test with the method

$scope.rteProperties.push({
                label: 'My Test',
                description: 'desc',
                view: 'rte',
                value: "TEST",
                config: {
                    editor: {
                        readonly: true,
                        toolbar: [],
                        stylesheets: [],
                        dimensions: { height: 400 }
                    }
                }
});

However the error is the same , is the method of adding dynamic properties to the back office no longer applicable or is there a new way to do this? I cannot find any example or reference to doing this in Umbraco 8

Any advice is appreciated!