Power BI Report server - Issue with deploying power bi report

This is the error message I get:

RSPortal!reportserverwebapp!4a!06/01/2017-10:48:27:: e ERROR: OData exception occurred: System.Net.WebException: The remote server returned an error: (401) Unauthorized.
at System.Net.HttpWebRequest.GetResponse()
at Microsoft.ReportingServices.Portal.ODataWebApi.Utils.PbixReportHelper.ValidateRenderingIsSupportedAndSetProperties(PowerBIReport entity, Uri requestUri, ILogger logger)
at Microsoft.ReportingServices.Portal.ODataWebApi.V2.Controllers.CatalogItemsController.ValidatePbiReportRenderingIsSupportedAndSetProperties(PowerBIReport item, Uri requestUri)
at Microsoft.ReportingServices.Portal.ODataWebApi.V2.Controllers.CatalogItemsController.AddEntity(CatalogItem entity, CatalogItem& createdEntity)
at Microsoft.ReportingServices.Portal.ODataWebApi.Controllers.Reflection.EntitySetReflectionODataController`1.Post(ODataPath oDataPath, T value)
at lambda_method(Closure , Object , Object[] )
at System.Web.Http.Controllers.ReflectedHttpActionDescriptor.ActionExecutor.<>c__DisplayClass10.<GetExecutor>b__9(Object instance, Object[] methodParameters)
at System.Web.Http.Controllers.ReflectedHttpActionDescriptor.ExecuteAsync(HttpControllerContext controllerContext, IDictionary`2 arguments, CancellationToken cancellationToken)
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at System.Web.Http.Controllers.ApiControllerActionInvoker.<InvokeActionAsyncCore>d__0.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at System.Web.Http.Controllers.ActionFilterResult.<ExecuteAsync>d__2.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at System.Web.Http.Controllers.ExceptionFilterResult.<ExecuteAsync>d__0.MoveNext(). | RequestID = s_929b6ff7-8515-42d7-b203-51bd46c8366a
RSPortal!reportserverwebapp!51!