Rest calls only work when fiddler is running

I apologize if this is not the right place to ask.

I am working on my first asp website.  Using Asp.net core, Angular.  In my javascript, I have a piece of code that looks like this:

var url = "http://www.xyz.com/something/"+orgid;
$http.get(url).then(function (response) { }).catch(function(response) {).finally() {});

The call returns the expected values when fiddler is running, but if it isn't, 

I don't know if there is a problem with my code and fiddler is masking it or if my code is fine, but there is something else I need to do with my dev environment.  

I thought I had enable cors, is this a cors issue?

Thanks