Something went wrong. Please try again later error after adding FQDN in Power Bi Report server

2023-03-09 15:12:21.2608|ERROR|61|OData exception occurred: System.Net.WebException: The remote server returned an error: (503) Server Unavailable.
at System.Net.HttpWebRequest.GetResponse()
at Microsoft.ReportingServices.Portal.ODataWebApi.Utils.PbixReportHelper.ShouldReShred(PowerBIReport entity, Uri basePortalUrl, ILogger logger, IPrincipal userPrincipal, String reportServerHostName)
at Microsoft.ReportingServices.Portal.ODataWebApi.Common.CatalogItemControllerHelper`1.GetItem(String key)
at Microsoft.ReportingServices.Portal.ODataWebApi.Common.CatalogItemControllerHelper`1.GetAllowedActions(String Id)
at lambda_method(Closure , Object , Object[] )
at System.Web.Http.Controllers.ReflectedHttpActionDescriptor.ActionExecutor.<>c__DisplayClass6_2.<GetExecutor>b__2(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.ExceptionServices.ExceptionDispatchInfo.Throw()
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at System.Web.Http.Controllers.ApiControllerActionInvoker.<InvokeActionAsyncCore>d__1.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at System.Web.Http.Controllers.ActionFilterResult.<ExecuteAsync>d__5.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at System.Web.Http.Controllers.ExceptionFilterResult.<ExecuteAsync>d__6.MoveNext().| RequestID = s_5b67f353-9dce-4eba-9f22-e18ab9233df1
2023-03-09 15:12:21.2608|INFO|64|Sending response. Response code OSB\XXXXXXXX 500, Elapsed time 0:00:00.0065245| RequestID = s_5b67f353-9dce-4eba-9f22-e18ab9233df1
2023-03-09 15:12:21.2608|INFO|61|Received request GET /api/v2.0/CatalogItems(Path='/SelfService/Underwriting/Weekly%20Completed%20Tasks')/AllowedActions| RequestID = s_ad7161ae-1c3b-4406-8328-72c10dd32475
2023-03-09 15:12:21.2608|ERROR|61|OData exception occurred: System.Net.WebException: The remote server returned an error: (503) Server Unavailable.
at System.Net.HttpWebRequest.GetResponse()
at Microsoft.ReportingServices.Portal.ODataWebApi.Utils.PbixReportHelper.ShouldReShred(PowerBIReport entity, Uri basePortalUrl, ILogger logger, IPrincipal userPrincipal, String reportServerHostName)
at Microsoft.ReportingServices.Portal.ODataWebApi.Common.CatalogItemControllerHelper`1.GetItem(String key)
at Microsoft.ReportingServices.Portal.ODataWebApi.Common.CatalogItemControllerHelper`1.GetAllowedActions(String Id)
at lambda_method(Closure , Object , Object[] )
at System.Web.Http.Controllers.ReflectedHttpActionDescriptor.ActionExecutor.<>c__DisplayClass6_2.<GetExecutor>b__2(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.ExceptionServices.ExceptionDispatchInfo.Throw()
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at System.Web.Http.Controllers.ApiControllerActionInvoker.<InvokeActionAsyncCore>d__1.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at System.Web.Http.Controllers.ActionFilterResult.<ExecuteAsync>d__5.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at System.Web.Http.Controllers.ExceptionFilterResult.<ExecuteAsync>d__6.MoveNext().| RequestID = s_ad7161ae-1c3b-4406-8328-72c10dd32475
2023-03-09 15:12:21.2608|INFO|70|Received request GET /api/v2.0/System/Properties| RequestID = s_62a0694b-0e32-44d8-9719-0ab1551b957c
2023-03-09 15:12:21.2608|INFO|67|Sending response. Response code OSB\XXXXXXXX 500, Elapsed time 0:00:00.0058911| RequestID = s_ad7161ae-1c3b-4406-8328-72c10dd32475
2023-03-09 15:12:21.2764|INFO|66|Sending response. Response code OSB\XXXXXXXX 200, Elapsed time 0:00:00.0028803| RequestID = s_62a0694b-0e32-44d8-9719-0ab1551b957c
2023-03-09 15:12:21.2764|INFO|70|Received request GET /api/v2.0/SafeGetSystemResourceContent(type='UniversalBrand',key='logo')| RequestID = s_30599561-637d-47e4-b809-58de9ec73c45
2023-03-09 15:12:21.2764|INFO|73|Sending response. Response code OSB\XXXXXXXX 200, Elapsed time 0:00:00.0029332| RequestID = s_30599561-637d-47e4-b809-58de9ec73c45
2023-03-09 15:12:21.2764|INFO|70|Received request GET /assets/fonts/PowrMDL2.woff| RequestID = s_fd7f760c-11c7-45a3-803f-d61b1f404005
2023-03-09 15:12:21.2921|INFO|70|Received request GET /assets/img/fi/pbirs/favicon.ico| RequestID = s_1a4c50f1-e9fb-4d18-babb-ed366e0ee463
2023-03-09 15:12:21.3702|INFO|70|Received request GET /assets/img/fi/pbirs/favicon-32x32.png| RequestID = s_b2ba2867-e839-4093-a392-6823e7351a47