Unable to Convert Classes into Dex Format

Having thrashed my way through a bunch of other build errors, I'm stuck on this one.

I'm trying to export to Android for Cardboard VR. I'm running Unity 5.6.0b3, JDK 8, SDK 8.1.1

I'd appreciate it if you could spell out any suggested steps for fixes, as I'm a little out of my depth with the sdks, tbh.

 CommandInvokationFailure: Unable to convert classes into dex format.
 /Library/Java/JavaVirtualMachines/jdk1.8.0_111.jdk/Contents/Home/bin/java -Xmx2048M -Dcom.android.sdkmanager.toolsdir="/Users/TimeImageOnline/Library/Android/sdk/tools" -Dfile.encoding=UTF8 -jar "/Applications/Unity/PlaybackEngines/AndroidPlayer/Tools/sdktools.jar" -
 
 stderr[
 Uncaught translation error: java.lang.IllegalArgumentException: already added: Lcom/google/common/logging/nano/Vr;
 Uncaught translation error: java.lang.IllegalArgumentException: already added: Lcom/google/common/logging/nano/Vr$VREvent;
 Uncaught translation error: java.lang.IllegalArgumentException: already added: Lcom/google/common/logging/nano/Vr$VREvent$Application;
 Uncaught translation error: java.lang.IllegalArgumentException: already added: Lcom/google/common/logging/nano/Vr$VREvent$AudioStats;
 Uncaught translation error: java.lang.IllegalArgumentException: already added: Lcom/google/common/logging/nano/Vr$VREvent$AudioStats$RenderingMode;
 Uncaught translation error: java.lang.IllegalArgumentException: already added: Lcom/google/common/logging/nano/Vr$VREvent$Bucket;
 Uncaught translation error: java.lang.IllegalArgumentException: already added: Lcom/google/common/logging/nano/Vr$VREvent$Cyclops;
 Uncaught translation error: java.lang.IllegalArgumentException: already added: Lcom/google/common/logging/nano/Vr$VREvent$Cyclops$Capture;
 Uncaught translation error: java.lang.IllegalArgumentException: already added: Lcom/google/common/logging/nano/Vr$VREvent$Cyclops$Capture$Outcome;
 
 UNEXPECTED TOP-LEVEL EXCEPTION:
 java.lang.RuntimeException: Translation has been interrupted
     at com.android.dx.command.dexer.Main.processAllFiles(Main.java:613)
     at com.android.dx.command.dexer.Main.runMonoDex(Main.java:311)
     at com.android.dx.command.dexer.Main.run(Main.java:277)
     at com.android.dx.command.dexer.Main.main(Main.java:245)
     at com.android.dx.command.Main.main(Main.java:106)
     at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
     at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
     at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
     at java.lang.reflect.Method.invoke(Method.java:498)
     at SDKMain.main(SDKMain.java:129)
 Caused by: java.lang.InterruptedException: Too many errors
     at com.android.dx.command.dexer.Main.processAllFiles(Main.java:605)
     ... 9 more
 ]
 stdout[
 processing archive /Users/TimeImageOnline/Desktop/GAMES DEV/BYOB beta/Temp/StagingArea/android-libraries/gvr-permissionsupport-release/libs/./classes.jar...
 processing com/google/gvr/permissionsupport/BuildConfig.class...
 processing com/google/gvr/permissionsupport/PermissionsFragment.class...
 processing com/google/gvr/permissionsupport/PermissionsFragment$1.class...
 processing com/google/gvr/permissionsupport/PermissionsFragment$PermissionsCallback.class...
 processing com/google/gvr/permissionsupport/TransitionVRActivity.class...
 processing com/google/gvr/permissionsupport/TransitionVRActivity$1.class...
 ignored resource /Users/TimeImageOnline/Desktop/GAMES DEV/BYOB beta/Temp/StagingArea/android-libraries/gvr/libs/./armeabi-v7a/libgvr.so
 processing archive /Users/TimeImageOnline/Desktop/GAMES DEV/BYOB beta/Temp/StagingArea/android-libraries/gvr/libs/./classes.jar...
 processing com/google/common/logging/nano/Vr.class...
 processing com/google/common/logging/nano/Vr$VREvent.class...
 processing com/google/common/logging/nano/Vr$VREvent$Application.class...
 processing com/google/common/logging/nano/Vr$VREvent$AudioStats.class...
 processing com/google/common/logging/nano/Vr$VREvent$AudioStats$RenderingMode.class...
 processing com/google/common/logging/nano/Vr$VREvent$Bucket.class...
 processing com/google/common/logging/nano/Vr$VREvent$Cyclops.class...
 processing com/google/common/logging/nano/Vr$VREvent$Cyclops$Capture.class...
 processing com/google/common/logging/nano/Vr$VREvent$Cyclops$Capture$Outcome.class...
 processing com/google/common/logging/nano/Vr$VREvent$Cyclops$Share.class...
 processing com/google/common/logging/nano/Vr$VREvent$Cyclops$Share$Type.class...
 processing com/google/common/logging/nano/Vr$VREvent$Cyclops$ShareStart.class...
 processing com/google/common/logging/nano/Vr$VREvent$Cyclops$ShareStart$OriginScreen.class...
 processing com/google/common/logging/nano/Vr$VREvent$Cyclops$View.class...
 processing com/google/common/logging/nano/Vr$VREvent$Cyclops$View$Orientation.class...
 processing com/google/common/logging/nano/Vr$VREvent$DoublePrecisionTransform.class...
 processing com/google/common/logging/nano/Vr$VREvent$EarthVr.class...
 processing com/google/common/logging/nano/Vr$VREvent$EarthVr$Actor.class...
 processing com/google/common/logging/nano/Vr$VREvent$EarthVr$Actor$ControllerState.class...
 processing com/google/common/logging/nano/Vr$VREvent$EarthVr$Actor$ControllerState$Role.class...
 processing com/google/common/logging/nano/Vr$VREvent$EarthVr$AppState.class...
 processing com/google/common/logging/nano/Vr$VREvent$EarthVr$ControllerState.class...
 processing com/google/common/logging/nano/Vr$VREvent$EarthVr$ControllerState$Role.class...
 processing com/google/common/logging/nano/Vr$VREvent$EarthVr$Menu.class...
 processing com/google/common/logging/nano/Vr$VREvent$EarthVr$Preferences.class...
 processing com/google/common/logging/nano/Vr$VREvent$EarthVr$Preferences$ComfortModeState.class...
 processing com/google/common/logging/nano/Vr$VREvent$EarthVr$Preferences$LabelsState.class...
 processing com/google/common/logging/nano/Vr$VREvent$EarthVr$Preferences$StartConfiguration.class...
 processing com/google/common/logging/nano/Vr$VREvent$EarthVr$Tour.class...
 processing com/google/common/logging/nano/Vr$VREvent$EarthVr$Tutorial.class...
 processing com/google/common/logging/nano/Vr$VREvent$EarthVr$View.class...
 processing com/google/common/logging/nano/Vr$VREvent$EarthVr$View$Mode.class...
 processing com/google/common/logging/nano/Vr$VREvent$EmbedVrWidget.class...
 processing com/google/common/logging/nano/Vr$VREvent$EmbedVrWidget$Pano.class...
 processing com/google/common/logging/nano/Vr$VREvent$EmbedVrWidget$StereoFormat.class...
 processing com/google/common/logging/nano/Vr$VREvent$EmbedVrWidget$Video.class...
 processing com/google/common/logging/nano/Vr$VREvent$EmbedVrWidget$ViewMode.class...
 processing com/google/common/logging/nano/Vr$VREvent$EventType.class...
 processing com/google/common/logging/nano/Vr$VREvent$HeadMount.class...
 processing com/google/common/logging/nano/Vr$VREvent$HistogramBucket.class...
 processing com/google/common/logging/nano/Vr$VREvent$Keyboard.class...
 processing com/google/common/logging/nano/Vr$VREvent$Keyboard$KeyboardEvent.class...
 processing com/google/common/logging/nano/Vr$VREvent$Keyboard$KeyboardEventType.class...
 processing com/google/common/logging/nano/Vr$VREvent$Keyboard$KeyboardInputType.class...
 processing com/google/common/logging/nano/Vr$VREvent$Keyboard$KeyboardTextEntry.class...
 processing com/google/common/logging/nano/Vr$VREvent$Keyboard$KeyboardTextType.class...
 processing com/google/common/logging/nano/Vr$VREvent$Launcher.class...
 processing com/google/common/logging/nano/Vr$VREvent$Launcher$NavItem.class...
 processing com/google/common/logging/nano/Vr$VREvent$PerformanceStats.class...
 processing com/google/common/logging/nano/Vr$VREvent$QrCodeScan.class...
 processing com/google/common/logging/nano/Vr$VREvent$QrCodeScan$Status.class...
 processing com/google/common/logging/nano/Vr$VREvent$SensorStats.class...
 processing com/google/common/logging/nano/Vr$VREvent$SensorStats$GyroscopeStats.class...
 processing com/google/common/logging/nano/Vr$VREvent$SensorStats$Vector3.class...
 processing com/google/common/logging/nano/Vr$VREvent$TimeSeriesData.class...
 processing com/google/common/logging/nano/Vr$VREvent$TimeSeriesData$TimeIntervalData.class...
 processing com/google/common/logging/nano/Vr$VREvent$Transform.class...
 processing com/google/common/logging/nano/Vr$VREvent$VrCore.class...
 processing com/google/common/logging/nano/Vr$VREvent$VrCore$Controller.class...
 processing com/google/common/logging/nano/Vr$VREvent$VrCore$ErrorCode.class...
 processing com/google/common/logging/nano/Vr$VREvent$VrCore$Permission.class...
 processing com/google/vr/audio/DeviceInfo.class...
 processing com/google/vr/audio/DeviceInfo$1.class...
 processing com/google/vr/audio/DeviceInfo$HeadphoneState.class...
 processing com/google/vr/cardboard/AndroidNCompat.class...
 processing com/google/vr/cardboard/AndroidNCompat$1.class...
 processing com/google/vr/cardboard/AndroidNCompat$2.class...
 processing com/google/vr/cardboard/AndroidNCompat$3.class...
 processing com/google/vr/cardboard/CardboardGLSurfaceView.class...
 processing com/google/vr/cardboard/CardboardGLSurfaceView$DetachListener.class...
 processing com/google/vr/cardboard/ConfigUtils.class...
 processing com/google/vr/cardboard/ContentProviderVrParamsProvider.class...
 processing com/google/vr/cardboard/ContextUtils.class...
 processing com/google/vr/cardboard/DisplaySynchronizer.class...
 processing com/google/vr/cardboard/DisplayUtils.class...
 processing com/google/vr/cardboard/EglFactory.class...
 processing com/google/vr/cardboard/FrameMonitor.class...
 processing com/google/vr/cardboard/FullscreenMode.class...
 processing com/google/vr/cardboard/FullscreenMode$1.class...
 processing com/google/vr/cardboard/FullscreenMode$1$1.class...
 processing com/google/vr/cardboard/LegacyVrParamsProvider.class...
 processing com/google/vr/cardboard/MutableEglConfigChooser.class...
 processing com/google/vr/cardboard/NFCUtils.class...
 processing com/google/vr/cardboard/NFCUtils$1.class...
 processing com/google/vr/cardboard/PackageUtils.class...
 processing com/google/vr/cardboard/PerfMonitor.class...
 processing com/google/vr/cardboard/PerfMonitor$1.class...
 processing com/google/vr/cardboard/PhoneParams.class...
 processing com/google/vr/cardboard/PhoneParams$PpiOverride.class...
 processing com/google/vr/cardboard/ScanlineRacingRenderer.class...
 processing com/google/vr/cardboard/ScanlineRacingRenderer$1.class...
 processing com/google/vr/cardboard/ScreenOrientationDetector.class...
 processing com/google/vr/cardboard/ScreenOrientationDetector$Listener.class...
 processing com/google/vr/cardboard/ScreenOrientationDetector$Orientation.class...
 processing com/google/vr/cardboard/StoragePermissionUtils.class...
 processing com/google/vr/cardboard/SurfaceTextureManager.class...
 processing com/google/vr/cardboard/SurfaceTextureManager$ExternalSurfaceCallback.class...
 processing com/google/vr/cardboard/SurfaceTextureManager$ExternalSurfaceCallback$1.class...
 processing com/google/vr/cardboard/SurfaceTextureManager$ExternalSurfaceCallback$2.class...
 processing com/google/vr/cardboard/SurfaceTextureManager$SurfaceTextureBundle.class...
 processing com/google/vr/cardboard/SurfaceTextureManager$SurfaceTextureBundle$1.class...
 processing com/google/vr/cardboard/ThreadUtils.class...
 processing com/google/vr/cardboard/TransitionView.class...
 processing com/google/vr/cardboard/TransitionView$1.class...
 processing com/google/vr/cardboard/TransitionView$2.class...
 processing com/google/vr/cardboard/TransitionView$3.class...
 processing com/google/vr/cardboard/TransitionView$4.class...
 processing com/google/vr/cardboard/TransitionView$5.class...
 processing com/google/vr/cardboard/TransitionView$TransitionListener.class...
 processing com/google/vr/cardboard/UiLayer.class...
 processing com/google/vr/cardboard/UiLayer$1.class...
 processing com/google/vr/cardboard/UiLayer$10.class...
 processing com/google/vr/cardboard/UiLayer$11.class...
 processing com/google/vr/cardboard/UiLayer$2.class...
 processing com/google/vr/cardboard/UiLayer$3.class...
 processing com/google/vr/cardboard/UiLayer$4.class...
 processing com/google/vr/cardboard/UiLayer$5.class...
 processing com/google/vr/cardboard/UiLayer$6.class...
 processing com/google/vr/cardboard/UiLayer$7.class...
 processing com/google/vr/cardboard/UiLayer$8.class...
 processing com/google/vr/cardboard/UiLayer$9.class...
 processing com/google/vr/cardboard/UiUtils.class...
 processing com/google/vr/cardboard/UiUtils$1.class...
 processing com/google/vr/cardboard/UiUtils$2.class...
 processing com/google/vr/cardboard/UiUtils$3.class...
 processing com/google/vr/cardboard/UiUtils$4.class...
 processing com/google/vr/cardboard/UiUtils$5.class...
 processing com/google/vr/cardboard/UsedByNative.class...
 processing com/google/vr/cardboard/VrCoreLibraryLoader.class...
 processing com/google/vr/cardboard/VrParamsProvider.class...
 processing com/google/vr/cardboard/VrParamsProviderFactory.class...
 processing com/google/vr/cardboard/VrParamsProviderFactory$ContentProviderClientHandle.class...
 processing com/google/vr/cardboard/VrParamsProviderJni.class...
 processing com/google/vr/cardboard/VrSettingsProviderContract.class...
 processing com/google/vr/cardboard/annotations/UsedByNative.class...
 processing com/google/vr/internal/controller/NativeCallbacks.class...
 processing com/google/vr/internal/controller/ServiceBridge.class...
 processing com/google/vr/internal/controller/ServiceBridge$1.class...
 processing com/google/vr/internal/controller/ServiceBridge$2.class...
 processing com/google/vr/internal/controller/ServiceBridge$3.class...
 processing com/google/vr/internal/controller/ServiceBridge$Callbacks.class...
 processing com/google/vr/ndk/base/AndroidCompat.class...
 processing com/google/vr/ndk/base/BufferSpec.class...
 processing com/google/vr/ndk/base/BufferViewport.class...
 processing com/google/vr/ndk/base/BufferViewport$EyeType.class...
 processing com/google/vr/ndk/base/BufferViewport$Reprojection.class...
 processing com/google/vr/ndk/base/BufferViewportList.class...
 processing com/google/vr/ndk/base/BuildConstants.class...
 processing com/google/vr/ndk/base/BuildFlags.class...
 processing com/google/vr/ndk/base/CardboardEmulator.class...
 processing com/google/vr/ndk/base/CardboardEmulator$ControllerCallbacks.class...
 processing com/google/vr/ndk/base/DaydreamAlignment.class...
 processing com/google/vr/ndk/base/DaydreamAlignment$1.class...
 processing com/google/vr/ndk/base/DaydreamAlignment$DefaultTouchListener.class...
 processing com/google/vr/ndk/base/DaydreamAlignment$FinishInitilizationTask.class...
 processing com/google/vr/ndk/base/DaydreamAlignment$RefreshViewerProfileTask.class...
 processing com/google/vr/ndk/base/DaydreamApi.class...
 processing com/google/vr/ndk/base/DaydreamApi$1.class...
 processing com/google/vr/ndk/base/DaydreamApi$2.class...
 processing com/google/vr/ndk/base/DaydreamApi$3.class...
 processing com/google/vr/ndk/base/DaydreamApi$4.class...
 processing com/google/vr/ndk/base/DaydreamApi$5.class...
 processing com/google/vr/ndk/base/DaydreamApi$6.class...
 processing com/google/vr/ndk/base/DaydreamApi$6$1.class...
 processing com/google/vr/ndk/base/DaydreamApi$7.class...
 processing com/google/vr/ndk/base/DaydreamApi$8.class...
 processing com/google/vr/ndk/base/DaydreamApi$9.class...
 processing com/google/vr/ndk/base/DaydreamUtils.class...
 processing com/google/vr/ndk/base/DaydreamUtilsWrapper.class...
 processing com/google/vr/ndk/base/FadeOverlayView.class...
 processing com/google/vr/ndk/base/FadeOverlayView$1.class...
 processing com/google/vr/ndk/base/FadeOverlayView$2.class...
 processing com/google/vr/ndk/base/Frame.class...
 processing com/google/vr/ndk/base/GvrApi.class...
 processing com/google/vr/ndk/base/GvrApi$Error.class...
 processing com/google/vr/ndk/base/GvrApi$PoseTracker.class...
 processing com/google/vr/ndk/base/GvrApi$ViewerType.class...
 processing com/google/vr/ndk/base/GvrLayout.class...
 processing com/google/vr/ndk/base/GvrLayout$1.class...
 processing com/google/vr/ndk/base/GvrLayout$2.class...
 processing com/google/vr/ndk/base/GvrLayout$3.class...
 processing com/google/vr/ndk/base/GvrLayout$ExternalSurfaceListener.class...
 processing com/google/vr/ndk/base/GvrLayout$PresentationFactory.class...
 processing com/google/vr/ndk/base/GvrLayout$PresentationHelper.class...
 processing com/google/vr/ndk/base/GvrLayout$PresentationListener.class...
 processing com/google/vr/ndk/base/GvrSurfaceView.class...
 processing com/google/vr/ndk/base/GvrSurfaceView$1.class...
 processing com/google/vr/ndk/base/GvrSurfaceView$BaseConfigChooser.class...
 processing com/google/vr/ndk/base/GvrSurfaceView$ComponentSizeChooser.class...
 proc<message truncated>