ERROR Cannot start analytics Tracker Exception: System.InvalidOperationException

Installing Stage and Prod Sitecore 9.1 farms.  

Have this error repeatedly showing in CM logs.  Not clear exactly what cert its looking for.  Where should this cert be?  How can i recreate and where should it go?

Any ideas?

6488 09:52:36 ERROR Cannot start analytics Tracker
Exception: System.InvalidOperationException
Message: The certificate was not found. Store: My, Location: LocalMachine, FindType: FindByThumbprint, FindValue: 663D415A5001B1DF624B7E10DC019B4A652504F3, InvalidAllowed: False.
Source: Sitecore.Xdb.Common.Web
at Sitecore.Xdb.Common.Web.Synchronous.SynchronousExtensions.SuspendContextLock[TResult](Func`1 taskFactory)
at Sitecore.Analytics.DataAccess.Dictionaries.DataStorage.ReferenceDataClientDictionary.EnsureDefinitionType(String definitionTypeName)
at Sitecore.Analytics.DataAccess.Dictionaries.DataStorage.ReferenceDataClientDictionary.LoadAs[T](Object key)
at Sitecore.Analytics.DataAccess.Dictionaries.AverageCounterExtensions.MeasureMilliseconds[T](AverageCounter counter, Func`1 func)
at Sitecore.Analytics.DataAccess.Dictionaries.ReferenceDataDictionary`2.Get(TKey key, LookupStrategy strategy)
at Sitecore.Analytics.DataAccess.Dictionaries.UserAgentsDictionary.Register(String userAgentName)
at Sitecore.Analytics.Tracking.CurrentVisitContext.set_UserAgent(String value)
at Sitecore.Analytics.Pipelines.CreateVisits.InitializeWithRequestData.Process(CreateVisitArgs args)
at (Object , Object )
at Sitecore.Pipelines.CorePipeline.Run(PipelineArgs args)
at Sitecore.Pipelines.DefaultCorePipelineManager.Run(String pipelineName, PipelineArgs args, String pipelineDomain, Boolean failIfNotExists)
at Sitecore.Pipelines.DefaultCorePipelineManager.Run(String pipelineName, PipelineArgs args, String pipelineDomain)
at Sitecore.Analytics.Pipelines.CreateVisits.CreateVisitPipeline.Run(CreateVisitArgs args)
at Sitecore.Analytics.Tracking.StandardSession.CreateInteraction(HttpContextBase httpContext)
at Sitecore.Analytics.Pipelines.InitializeTracker.CreateVisit.Process(InitializeTrackerArgs args)
at (Object , Object )
at Sitecore.Pipelines.CorePipeline.Run(PipelineArgs args)
at Sitecore.Pipelines.DefaultCorePipelineManager.Run(String pipelineName, PipelineArgs args, String pipelineDomain, Boolean failIfNotExists)
at Sitecore.Pipelines.DefaultCorePipelineManager.Run(String pipelineName, PipelineArgs args, String pipelineDomain)
at Sitecore.Analytics.Pipelines.InitializeTracker.InitializeTrackerPipeline.Run(InitializeTrackerArgs args)
at (Object , Object )
at Sitecore.Pipelines.CorePipeline.Run(PipelineArgs args)
at Sitecore.Pipelines.DefaultCorePipelineManager.Run(String pipelineName, PipelineArgs args, String pipelineDomain, Boolean failIfNotExists)
at Sitecore.Pipelines.DefaultCorePipelineManager.Run(String pipelineName, PipelineArgs args, String pipelineDomain)
at Sitecore.Analytics.Pipelines.StartTracking.StartTrackingPipeline.Run(StartTrackingArgs args)
at Sitecore.Analytics.DefaultTracker.StartTracking()

 

Thanks in advance!