Analytics and Web AppBuilder Error

I followed all the direction online about adding Analytics to ESRI WAB and I'm getting this error message...

"Status code: 400 (Bad Request)Error message: Value cannot be null. Parameter name: uriStringException: System.ArgumentNullExceptionat System.Uri..ctor(String uriString) at Geocortex.Analytics.Infrastructure.Collection.Jobs.Website.WebsiteCrawlHelper.PerformWebRequest(String url, ProtocolMethod requestType, NameValueCollection parameters, HttpClient webClient, Int32 retryLimit, CancellationToken cancellationToken) at Geocortex.Analytics.Infrastructure.Collection.Jobs.WebApplicationCrawlJob.GetWebRequestResponse(WebApplicationNode node, HttpClient httpClient, ICollectionComponents collectionComponents) at Geocortex.Analytics.Infrastructure.Collection.Nodes.WebApplicationNode.GetWebRequestResponseForAlarm(ICollectionComponents collectionComponents) at Geocortex.Analytics.Infrastructure.Alarms.AlarmBase.PerformNewCheckAndUpdateAlarmEventState(ResourceNodeBase resourceNode, ICollectionComponents collectionComponents, Nullable`1 timestamp) at Geocortex.Analytics.ConfigurationService.AlarmConfigurationService.Post(AlarmsCheckNowRequest request) --- 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.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.Filters.ActionFilterAttribute.d__6.MoveNext() --- End of stack trace from previous location where exception was thrown --- at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw() at System.Web.Http.Filters.ActionFilterAttribute.d__6.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.Filters.ActionFilterAttribute.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.ActionFilterResult.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.d__6.MoveNext()"