Custom Shape Maps Unexpected Error

I literally just typed in the stuff in my sample above, set the Country column's data category to Country/Region, and tried to load world-countries.json into the map. Here's the error details:

Feedback Type:
Frown (Error)

Timestamp:
2016-10-24T14:19:49.8800528Z

Local Time:
2016-10-24T10:19:49.8800528-04:00

Product Version:
2.39.4526.362 (PBIDesktop) (x64)

Release:
September 2016

IE Version:
11.321.14393.0

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.

Peak Working Set:
386 MB

Private Memory:
260 MB

Peak Virtual Memory:
33.9 GB

JS Error Message:
Failed to execute 'btoa' on 'Window': The string to be encoded contains characters outside of the Latin1 range.

Error Message:
An error occurred while rendering the report.

Stack Trace:
Microsoft.Mashup.Host.Document.JavaScriptException: An error occurred while rendering the report.
Error: Failed to execute 'btoa' on 'Window': The string to be encoded contains characters outside of the Latin1 range.
at Error (native)
at saveSliceToDefinition (ms-pbi://pbi.microsoft.com/minerva/scripts/exploreui.js:9328:77)
at Object.saveChangedSliceToDefinition [as save] (ms-pbi://pbi.microsoft.com/minerva/scripts/exploreui.js:9354:25)
at ms-pbi://pbi.microsoft.com/minerva/scripts/exploreui.js:8590:113
at UndoRedoService.register (ms-pbi://pbi.microsoft.com/minerva/scripts/explore.js:6265:159)
at PropertyPaneController.save (ms-pbi://pbi.microsoft.com/minerva/scripts/exploreui.js:8589:93)
at fn (eval at <anonymous> (ms-pbi://pbi.microsoft.com/minerva/scripts/angular.js:1:0), <anonymous>:4:382)
at PropertyCardController.destination.(anonymous function) [as cardChanged] (ms-pbi://pbi.microsoft.com/minerva/scripts/angular.js:9739:22)
at PropertyCardController.sliceChanged (ms-pbi://pbi.microsoft.com/minerva/scripts/exploreui.js:8515:127)
at fn (eval at <anonymous> (ms-pbi://pbi.microsoft.com/minerva/scripts/angular.js:1:0), <anonymous>:4:323)

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.FeedbackErrorInfo..ctor(String message, Nullable`1 errorCode, String requestId, Exception exception)
at Microsoft.Mashup.Client.ClientShared.UnexpectedExceptionHandler.<>c__DisplayClass1.<HandleException>b__0()
at Microsoft.Mashup.Host.Document.SynchronizationContextExtensions.<>c__DisplayClass3.<SendAndMarshalExceptions>b__0(Object null)
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)
at System.Windows.Forms.UnsafeNativeMethods.DispatchMessageW(MSG& msg)
at System.Windows.Forms.UnsafeNativeMethods.DispatchMessageW(MSG& msg)
at System.Windows.Forms.Application.ComponentManager.System.Windows.Forms.UnsafeNativeMethods.IMsoComponentManager.FPushMessageLoop(IntPtr dwComponentID, Int32 reason, Int32 pvLoopData)
at System.Windows.Forms.Application.ThreadContext.RunMessageLoopInner(Int32 reason, ApplicationContext context)
at System.Windows.Forms.Application.ThreadContext.RunMessageLoop(Int32 reason, ApplicationContext context)
at System.Windows.Forms.Form.ShowDialog(IWin32Window owner)
at Microsoft.Mashup.Client.ClientShared.WindowManager.ShowDialog[T](T form, IWin32Window owner)
at Microsoft.PowerBI.Client.Program.<>c__DisplayClassb.<Main>b__0()
at Microsoft.Mashup.Host.Document.ExceptionHandlerExtensions.HandleExceptions(IExceptionHandler exceptionHandler, Action action)
at Microsoft.PowerBI.Client.Program.Main(String[] args)

User ID:
73a57705-1f23-4e51-9f3a-7208da732c7f

Session ID:
b9b3d5f6-84b2-47d9-b322-55db2026d8e6

Telemetry Enabled:
True

Model Default Mode:
Import

Snapshot Trace Logs:
C:\Users\khorseman\AppData\Local\Microsoft\Power BI Desktop\FrownSnapShot2069757971.zip

Performance Trace Logs:
C:\Users\khorseman\AppData\Local\Microsoft\Power BI Desktop\PerformanceTraces.zip

Enabled Preview Features:
PBI_shapeMapVisualEnabled
PBI_forecastEnabled

Disabled Preview Features:
PBI_RedShift
PBI_Impala
PBI_Snowflake
PBI_allowBiDiCrossFilterInDirectQuery
PBI_esriEnabled
PBI_mobileReportAuthoringEnabled

Disabled DirectQuery Options:
DirectQuery_Unrestricted

Recent Actions:
AddEmptyVisualContainer, AddFieldInRole, VisualContainerPersistProperties, AddFieldInRole, AddVisualContainer, AddFieldToVisual, VisualConversion

Formulas:

section Section1;

shared Table1 = let
Source = Table.FromRows(Json.Document(Binary.Decompress(Binary.FromText("NY3LCsIwFER/Re66G/NodakFoUI3iquQxaUJGAi3kqSgfr154PKcYWaUgge5ZM3unjDZCB3sQXcKpoT+k0kyKaq4BKTFZvMXpy2mgN5hdoehqtsWY+Nj5fHpqKDsW+WKL6QSNzwH/DpfLlnl2b7dsmYWXLTBEQlNWeByaJ2JTH1gXILWPw==", BinaryEncoding.Base64), Compression.Deflate)), let _t = ((type text) meta [Serialized.Text = true]) in type table [Country = _t, Amount = _t]),
#"Changed Type" = Table.TransformColumnTypes(Source,{{"Country", type text}, {"Amount", Int64.Type}})
in
#"Changed Type";

Active Section Contract:
{"id":0,"name":"ReportSection","displayName":"Page 1","ordinal":0,"visualContainers":[{"x":10,"y":20,"z":1,"width":280,"height":280,"config":"{\"layouts\":[{\"id\":0,\"position\":{\"x\":10,\"y\":20,\"width\":280,\"height\":280,\"z\":1}}],\"singleVisual\":{\"visualType\":\"shapeMap\",\"projections\":{\"Category\":[{\"queryRef\":\"Table1.Country\"}],\"Value\":[{\"queryRef\":\"Sum(Table1.Amount)\"}]},\"prototypeQuery\":{\"Version\":2,\"From\":[{\"Name\":\"t\",\"Entity\":\"Table1\"}],\"Select\":[{\"Column\":{\"Expression\":{\"SourceRef\":{\"Source\":\"t\"}},\"Property\":\"Country\"},\"Name\":\"Table1.Country\"},{\"Aggregation\":{\"Expression\":{\"Column\":{\"Expression\":{\"SourceRef\":{\"Source\":\"t\"}},\"Property\":\"Amount\"}},\"Function\":0},\"Name\":\"Sum(Table1.Amount)\"}]},\"objects\":{\"shape\":[{\"properties\":{\"map\":{\"geoJson\":{\"type\":{\"expr\":{\"Literal\":{\"Value\":\"'shared'\"}}},\"name\":{\"expr\":{\"Literal\":{\"Value\":\"'usa.states.topo'\"}}},\"content\":{\"expr\":{\"ResourcePackageItem\":{\"PackageName\":\"ShapeMap\",\"PackageType\":2,\"ItemName\":\"usa.states.topo\"}}}}},\"projectionEnum\":{\"expr\":{\"Literal\":{\"Value\":\"'albersUsa'\"}}}}}],\"dataPoint\":[{\"properties\":{\"fillRule\":{\"linearGradient2\":{\"max\":{\"color\":{\"expr\":{\"Literal\":{\"Value\":\"'#01B8AA'\"}}}},\"min\":{\"color\":{\"expr\":{\"Literal\":{\"Value\":\"'#ccf1ee'\"}}}}}}}}]}},\"name\":\"VisualContainer\"}"},{"x":441.875759416768,"y":107.2053462940462,"z":2,"width":300,"height":300,"config":"{\"layouts\":[{\"id\":0,\"position\":{\"x\":441.875759416768,\"y\":107.2053462940462,\"width\":300,\"height\":300,\"z\":2}}],\"singleVisual\":{\"visualType\":\"table\",\"projections\":{\"Values\":[{\"queryRef\":\"Table1.Country\"},{\"queryRef\":\"Sum(Table1.Amount)\"}]},\"prototypeQuery\":{\"Version\":2,\"From\":[{\"Name\":\"t\",\"Entity\":\"Table1\"}],\"Select\":[{\"Column\":{\"Expression\":{\"SourceRef\":{\"Source\":\"t\"}},\"Property\":\"Country\"},\"Name\":\"Table1.Country\"},{\"Aggregation\":{\"Expression\":{\"Column\":{\"Expression\":{\"SourceRef\":{\"Source\":\"t\"}},\"Property\":\"Amount\"}},\"Function\":0},\"Name\":\"Sum(Table1.Amount)\"}]}},\"name\":\"VisualContainer1\"}"}],"displayOption":1,"width":1280,"height":720,"config":"{}"}