The region does not exist.
Assembly: Microsoft.ApplicationServer.Caching.Core (in Microsoft.ApplicationServer.Caching.Core.dll)
Regions are a cache construct and do not persist in cache after the cache cluster is restarted. Each time the cluster starts, regions much be created with the F:Microsoft.Data.Caching.DataCache.CreateRegion method. For more information about regions, see .fc7448ae-abdb-47d1-8d16-fff16a374e67