If you're using Windows Server AppFabric caching and have recently updated to version 1.8 of the Windows Azure SDK, you might be running into some difficulty in connecting to the caching instance.
I started receiving this error when trying to access the cache:
:SubStatus :Check the client version. It should be within the allowed version range on the server. If necessary, upgrade the client to the allowed version.
After a ton of investigation, the fix was really easy: remove all caching SDK assembly references (Microsoft.ApplicationServices.*) and replace it with the Windows Azure Shared Caching NuGet package:
That should clear that error right up.
While these all didn't pertain to my end solution, these are the various sources that helped shed some light on the issue: