This issue came after @EricLaw explained me what was the problem when I could not receive a response back from my REST request.
Essentially the request was just returning blank, then I found out that if Fiddler was not running, the application works just fine.
As Eric explains there are some security issues that I should consider when developing/debugging in Windows Server 2012.
I followed the instructions and installed the suggested utility but when I click in the AppContainer Loopback utility I get the following error: Failed to get AppContainer info: Unable to enumerate AppContainer, Is the windows Firewall Service started?
Of course, my Firewall Service is working just fine.
Additionally there is something I still don't understand, why my HTTP request works just fine whenever Fiddler is not running anyway?
Has anyone had this problem already?
PS: we need a new tag called fiddler4