Error Specified key is not a valid size for this algorithm

We are also getting this same error across the board with Excel 2016.  Attempting to connect to SQL Server.  Just started today 4/24/2017.  No issues in Power BI Desktop - just Excel 2016 Pro:

Feedback Type:
Frown (Error)

Timestamp:
2017-04-25T00:24:38.2078052Z

Local Time:
2017-04-24T18:24:38.2078052-06:00

Product Version:
2.44.4675.243 (PQ-CY17SU03) (x64)

Release:
March 2017

Excel Version:
16.0.4522.1000

Excel Install Location:
C:\Program Files\Microsoft Office\Office16\EXCEL.EXE

IE Version:
11.1066.14393.0

OS Version:
Microsoft Windows NT 10.0.14393.0 (x64 en-US)

CLR Version:
4.6.2. or later [Release Number = 394802]

Workbook Package Info:
1* - en-US, fastCombine: Disabled, runBackgroundAnalysis: True.

Peak Working Set:
325 MB

Private Memory:
286 MB

Peak Virtual Memory:
34 GB

Error Message:
The specified key is not a valid size for this algorithm.
Parameter name: key

Stack Trace:
Microsoft.Mashup.Evaluator.Interface.ErrorException: The specified key is not a valid size for this algorithm.
Parameter name: key ---> System.ArgumentException: The specified key is not a valid size for this algorithm.
Parameter name: key ---> System.ArgumentException: The specified key is not a valid size for this algorithm.
Parameter name: key
   at System.Security.Cryptography.AesCryptoServiceProvider.CreateEncryptor(Byte[] key, Byte[] iv)
   at Microsoft.Mashup.EngineHost.Services.EncryptedPersistentCache.EncryptedStorage.EncryptPage(Byte[] input, Int32 count, Byte[] output)
   at Microsoft.Mashup.EngineHost.Services.TransformingPagedStream.WritePage(Int32 page, Byte[] buffer, Int32 length)
   at Microsoft.Mashup.EngineHost.Services.PagedStream.Flush()
   at Microsoft.Mashup.EngineHost.Services.EncryptedPersistentCache.EncryptedStorage.CommitStream(Int32 id, Stream stream)
   at Microsoft.Mashup.EngineHost.Services.WriteBehindPersistentCache.AsyncCommitStorage(String key, TemporaryStorage storage)
   at Microsoft.Mashup.EngineHost.Services.WriteBehindPersistentCache.AsyncCommitStorage(Object obj)
   at Microsoft.Mashup.Evaluator.EvaluatorThreadPool.EvaluatorThread(Object state)
   at Microsoft.Mashup.Evaluator.SafeThread2.<>c__DisplayClass15.<CreateAction>b__14(Object o)
   --- End of inner exception stack trace ---
   at Microsoft.Mashup.Evaluator.EvaluationHost.<>c__DisplayClass7.<TryReportException>b__6()
   at Microsoft.Mashup.Common.SafeExceptions.IgnoreSafeExceptions(IEngineHost host, IHostTrace trace, Action action)
   at Microsoft.Mashup.Evaluator.EvaluationHost.TryReportException(IHostTrace trace, IEngineHost engineHost, IMessageChannel channel, Exception exception)
   at Microsoft.Mashup.Evaluator.EvaluationHost.TryHandleException(Exception exception)
   at Microsoft.Mashup.Evaluator.SafeThread2.HandleException(Exception e)
   at Microsoft.Mashup.Evaluator.SafeThread2.<>c__DisplayClass15.<CreateAction>b__14(Object o)
   at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
   at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
   at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
   at System.Threading.ThreadHelper.ThreadStart(Object obj)
   --- End of inner exception stack trace ---
   at Microsoft.Mashup.Evaluator.EvaluationHost.OnException(IEngineHost engineHost, IMessageChannel channel, ExceptionMessage message)
   at Microsoft.Mashup.Evaluator.MessageHandlers.TryDispatch(IMessageChannel channel, Message message)
   at Microsoft.Mashup.Evaluator.MessageHandlers.Dispatch(IMessageChannel channel, Message message)
   at Microsoft.Mashup.Evaluator.ChannelMessenger.ChannelMessageHandlers.TryDispatch(IMessageChannel channel, Message message)
   at Microsoft.Mashup.Evaluator.MessageHandlers.Dispatch(IMessageChannel channel, Message message)
   at Microsoft.Mashup.Evaluator.ChannelMessenger.OnMessageWithUnknownChannel(IMessageChannel baseChannel, MessageWithUnknownChannel messageWithUnknownChannel)
   at Microsoft.Mashup.Evaluator.MessageHandlers.TryDispatch(IMessageChannel channel, Message message)
   at Microsoft.Mashup.Evaluator.ChannelMessenger.ChannelMessageHandlers.TryDispatch(IMessageChannel channel, Message message)
   at Microsoft.Mashup.Evaluator.MessageHandlers.Dispatch(IMessageChannel channel, Message message)
   at Microsoft.Mashup.Evaluator.Interface.IMessageChannelExtensions.WaitFor[T](IMessageChannel channel)
   at Microsoft.Mashup.Evaluator.RemotePreviewValueSource.PreviewValueSource.WaitFor(Func`1 condition, Boolean disposing)
   at Microsoft.Mashup.Evaluator.RemotePreviewValueSource.PreviewValueSource.get_SmallValue()
   at Microsoft.Mashup.Evaluator.Interface.TracingPreviewValueSource.get_SmallValue()
   at Microsoft.Mashup.Host.Document.Analysis.PackageDocumentAnalysisInfo.PackagePartitionAnalysisInfo.SetPreviewValue(EvaluationResult2`1 result, Func`1 getStaleSince, Func`1 getSampled)

Invocation Stack Trace:
   at Microsoft.Mashup.Host.Document.ExceptionExtensions.GetCurrentInvocationStackTrace()
   at Microsoft.Mashup.Client.ClientShared.StackTraceInfo..ctor(String exceptionStackTrace, String invocationStackTrace)
   at Microsoft.Mashup.Client.ClientShared.DataImporter.HandleImportEvaluationException(ExceptionResult exceptionView, Query query, String sourceID, String formulaTitle, Boolean isNewQuery, Boolean isFromEditor)
   at Microsoft.Mashup.Client.ClientShared.DataImporter.OnGetPreviewResult(PreviewResult preview, Query query, String sourceID, String formulaTitle, Nullable`1 explicitImportDestination, Boolean isNewQuery, Boolean isFromEditor)
   at Microsoft.Mashup.Client.ClientShared.DataImporter.<>c__DisplayClass1d.<OnQuerySettingsResolved>b__1a()
   at Microsoft.Mashup.Host.Document.ExceptionHandlerExtensions.HandleExceptions(IExceptionHandler exceptionHandler, Action action)
   at System.RuntimeMethodHandle.InvokeMethod(Object target, Object[] arguments, Signature sig, Boolean constructor)
   at System.Reflection.RuntimeMethodInfo.UnsafeInvokeInternal(Object obj, Object[] parameters, Object[] arguments)
   at System.Delegate.DynamicInvokeImpl(Object[] args)
   at System.Windows.Forms.Control.InvokeMarshaledCallbackDo(ThreadMethodEntry tme)
   at System.Windows.Forms.Control.InvokeMarshaledCallbackHelper(Object obj)
   at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
   at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
   at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
   at System.Windows.Forms.Control.InvokeMarshaledCallback(ThreadMethodEntry tme)
   at System.Windows.Forms.Control.InvokeMarshaledCallbacks()
   at System.Windows.Forms.Control.WndProc(Message& m)
   at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)

Supports Premium Content:
True

Formulas:

section Section1;

shared Query1 = let
    Source = Sql.Databases("db03snlnt\pr")
in
    Source;