Sketch import fatal unhandled exception

Bug Reports
1

Fuse version 1.3.0 (build 14520)
Mac OS, 10.12.6
sketchtool version 47.1 (45422)

run: fuse import trakdesign_standins.sketch --app MainView.ux (file available privately upon request)
output:

Kimberlys-MacBook-Pro:HelloTrakApp kimrobinson$ fuse import trakdesign_standins.sketch --app MainView.ux
Analyzing trakdesign_standins.sketch. This can take a while if the file is big.
Analyzing file structure...
Extracting font: Rubik Medium
Extracting image: trakdesign_standins.Survey_Question.Exit
Extracting image: trakdesign_standins.Survey_Question.Backwards
Extracting font: Rubik Regular
Extracting image: trakdesign_standins.Survey_Question._049_wall
Extracting image: trakdesign_standins.Survey_Question.Response1.FaceIconStandin
Extracting image: trakdesign_standins.Survey_Question.Response1.background
Extracting image: trakdesign_standins.Survey_Question.Response2.FaceIconStandin

Unhandled Exception:
Microsoft.CSharp.RuntimeBinder.RuntimeBinderException: `SketchImporter.JSON.DynamicDictionary' does not contain a definition for `textStyle'
  at (wrapper dynamic-method) System.Object:CallSite.Target (System.Runtime.CompilerServices.Closure,System.Runtime.CompilerServices.CallSite,object)
  at SketchImporter.TextLayer.get_FontHandleIdentifier () <0x10de17bc0 + 0x005a9> in <filename unknown>:0 
  at SketchImporter.TextLayer.Emit (SketchImporter.UXBuilder ux) <0x10de17ad0 + 0x0001f> in <filename unknown>:0 
  at SketchImporter.ParentLayer.EmitChildren (SketchImporter.UXBuilder ux) <0x10de17360 + 0x00085> in <filename unknown>:0 
  at SketchImporter.ParentLayer.Emit (SketchImporter.UXBuilder ux) <0x10de12780 + 0x00083> in <filename unknown>:0 
  at SketchImporter.ParentLayer.EmitChildren (SketchImporter.UXBuilder ux) <0x10de17360 + 0x00085> in <filename unknown>:0 
  at SketchImporter.ParentLayer.Emit (SketchImporter.UXBuilder ux) <0x10de12780 + 0x00083> in <filename unknown>:0 
  at SketchImporter.Page.EmitChildren (SketchImporter.UXBuilder ux) <0x10de170e0 + 0x0006d> in <filename unknown>:0 
  at SketchImporter.ParentLayer.Emit (SketchImporter.UXBuilder ux) <0x10de12780 + 0x00083> in <filename unknown>:0 
  at SketchImporter.Document.Emit (SketchImporter.UXBuilder ux) <0x10de12730 + 0x00036> in <filename unknown>:0 
  at SketchImporter.Program.ProcessSketchFile (System.String sketchFile, System.String resPath, System.String appPath, System.Double[] densities) <0x105b75c60 + 0x00476> in <filename unknown>:0 
  at SketchImporter.Program.Main (System.String[] args) <0x101bc2ed0 + 0x00821> in <filename unknown>:0 
[ERROR] FATAL UNHANDLED EXCEPTION: Microsoft.CSharp.RuntimeBinder.RuntimeBinderException: `SketchImporter.JSON.DynamicDictionary' does not contain a definition for `textStyle'
  at (wrapper dynamic-method) System.Object:CallSite.Target (System.Runtime.CompilerServices.Closure,System.Runtime.CompilerServices.CallSite,object)
  at SketchImporter.TextLayer.get_FontHandleIdentifier () <0x10de17bc0 + 0x005a9> in <filename unknown>:0 
  at SketchImporter.TextLayer.Emit (SketchImporter.UXBuilder ux) <0x10de17ad0 + 0x0001f> in <filename unknown>:0 
  at SketchImporter.ParentLayer.EmitChildren (SketchImporter.UXBuilder ux) <0x10de17360 + 0x00085> in <filename unknown>:0 
  at SketchImporter.ParentLayer.Emit (SketchImporter.UXBuilder ux) <0x10de12780 + 0x00083> in <filename unknown>:0 
  at SketchImporter.ParentLayer.EmitChildren (SketchImporter.UXBuilder ux) <0x10de17360 + 0x00085> in <filename unknown>:0 
  at SketchImporter.ParentLayer.Emit (SketchImporter.UXBuilder ux) <0x10de12780 + 0x00083> in <filename unknown>:0 
  at SketchImporter.Page.EmitChildren (SketchImporter.UXBuilder ux) <0x10de170e0 + 0x0006d> in <filename unknown>:0 
  at SketchImporter.ParentLayer.Emit (SketchImporter.UXBuilder ux) <0x10de12780 + 0x00083> in <filename unknown>:0 
  at SketchImporter.Document.Emit (SketchImporter.UXBuilder ux) <0x10de12730 + 0x00036> in <filename unknown>:0 
  at SketchImporter.Program.ProcessSketchFile (System.String sketchFile, System.String resPath, System.String appPath, System.Double[] densities) <0x105b75c60 + 0x00476> in <filename unknown>:0 
  at SketchImporter.Program.Main (System.String[] args) <0x101bc2ed0 + 0x00821> in <filename unknown>:0 
fuse: Import failed: An error occurred on import