PUN 1.75 don't export to Windows Phone 8.1

Hello.
PUN+ 1.75 don't export to Windows Phone 8.1 or universal 8.1.
Previous PUN+ 1.74 was working fine.
I did followed the instructions on the Unity Export to Windows 8.1 and Windows 10 Universal thread.
I have Unity 5.4.0f3 x64

Is there a way to fix it?

It gives the following error:

UnityException: Failed to run serialization weaver with command "Temp\StagingArea\Data\Managed\Photon3Unity3D.dll" -pdb -verbose -unity-engine="Temp\StagingArea\Data\Managed\UnityEngine.dll" "Temp\StagingArea\TempSerializationWeaver" -additionalAssemblyPath="C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\WindowsPhoneApp\v8.1" -additionalAssemblyPath="Temp\StagingArea\Data\Managed".
Symbols will be read from Temp\StagingArea\Data\Managed\UnityEngine.pdb
Symbols will be read from Temp\StagingArea\Data\Managed\Photon3Unity3D.pdb
Weaving assembly D:\WorkD\UnityProjects\PATWO\PATWO\Temp\StagingArea\Data\Managed\Photon3Unity3D.dll
System.InvalidOperationException: Operaci n no v lida dado el estado actual del objeto.
en Mono.Cecil.ModuleDefinition.ProcessDebugHeader()
en Mono.Cecil.ModuleReader.ReadSymbols(ModuleDefinition module, ReaderParameters parameters)
en Mono.Cecil.ModuleReader.CreateModuleFrom(Image image, ReaderParameters parameters)
en Mono.Cecil.ModuleDefinition.ReadModule(String fileName, ReaderParameters parameters)
en usw.Weaver.WeaveAssembly(String assemblyPath, AssemblyDefinition unityEngineAssemblyDefinition, ReaderParameters readerParameters)
en usw.Weaver.Weave()
en usw.Program.RunProgram(ConversionOptions options)
en usw.Program.Main(String[] args)

PostProcessWinRT.RunSerializationWeaver () (at C:/buildslave/unity/build/PlatformDependent/WinRT/SharedSources/CSharp/PostProcessWinRT.cs:438)
PostProcessWinRT.Process () (at C:/buildslave/unity/build/PlatformDependent/WinRT/SharedSources/CSharp/PostProcessWinRT.cs:123)
UnityEditor.Metro.BuildPostprocessor.PostProcess (BuildPostProcessArgs args) (at C:/buildslave/unity/build/PlatformDependent/MetroPlayer/Extensions/Managed/ExtensionModule.cs:130)
UnityEditor.PostprocessBuildPlayer.Postprocess (BuildTarget target, System.String installPath, System.String companyName, System.String productName, Int32 width, Int32 height, System.String downloadWebplayerUrl, System.String manualDownloadWebplayerUrl, BuildOptions options, UnityEditor.RuntimeClassRegistry usedClassRegistry, UnityEditor.BuildReporting.BuildReport report) (at C:/buildslave/unity/build/Editor/Mono/BuildPipeline/PostprocessBuildPlayer.cs:176)
UnityEditor.HostView:OnGUI()


Thanks.