Link not accessible in IIS

I'm doing an application in C # using the MVC standard. It uses a Google FireBase database.

Running this application through the Visual Studio debugger works normally, but when you try to publish it to localhost , through the IIS manager, the application gives host of the server, and both executions are on the same computer and same network and I already checked some firewall settings on the computer and iis, but it does not work.

Give this print message below:

public ActionResult GetMenuPrincipal()
{
    FirebaseDB firebaseDB = new FirebaseDB("https://link-firebase/");
    FirebaseDB firebaseDB1 = firebaseDB.Node("Projects");
    List<ProjectModel> projectModels = 
JsonConvert.DeserializeObject<List<ProjectModel>>(firebaseDB1.Get().JSONContent);

    return PartialView(projectModels);
}'