How to connect to SSAS Cube on localhost

Hi,
I have an SSAS cube which is under development and it is running on localhost(localhost:56991). When I try to connect it through flexmonster accelerator I'm getting an error(Please refer the attached file). The configuration is as mentioned below. Could you please help me out to fix this. Please let us know the difference between catalog and cube(in the config) and how to find them.

//index.cshtml
container: "#pivot-container",
            componentFolder: "https://cdn.flexmonster.com/",
            height: 600,
            toolbar: true,
            report: {
                dataSource: {
                    dataSourceType: "microsoft analysis services",
                    proxyUrl: "/api/accelerator/",
                    catalog: "CareStackBICube_athul_4f51b40c-d0e6-4b23-96d7-12f2067d5f77",
                    cube: "CareStackBICube_athul_4f51b40c-d0e6-4b23-96d7-12f2067d5f77",
                    binary: true,
                    // role: "Practice"
                },
                slice: {
                    rows: [
                        { uniqueName: "[FactProduction].[sPracticeKey]" }
                    ]
                }
            }
//FlexmonsterConfig.cs

 public class FlexmonsterConfig
    {
        public static void Register()
        {
            // Replace with actual data source. 
            // Example: Data Source=localhost
            Flexmonster.Accelerator.Controllers.FlexmonsterProxyController.ConnectionString = "Data Source=http://localhost:56991";
            Flexmonster.Accelerator.Utils.CacheManager.MemoryLimit = 10 * 1024 * 1024; // Mb to bytes
            Flexmonster.Accelerator.Utils.CacheManager.Enabled = true;
            //Flexmonster.Accelerator.Utils.LoggerLocator.SetLogger(new Flexmonster.Accelerator.Utils.ILogger());
        }
    }