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Compile Error that I Cant Find Any Solution

This is the error i am getting :

CompilerResultsLog: ERROR: Unhandled exception: System.Runtime.Serialization.SerializationException: The input stream is not a valid binary format. The starting contents (in bytes) are: 72-79-2E-68-83-CB-3C-33-00-7E-D7-08-00-50-2B-00-00 …
CompilerResultsLog: at System.Runtime.Serialization.Formatters.Binary.SerializationHeaderRecord.Read(__BinaryParser input)
CompilerResultsLog: at System.Runtime.Serialization.Formatters.Binary.__BinaryParser.ReadSerializationHeaderRecord()
CompilerResultsLog: at System.Runtime.Serialization.Formatters.Binary.__BinaryParser.Run()
CompilerResultsLog: at System.Runtime.Serialization.Formatters.Binary.ObjectReader.Deserialize(HeaderHandler handler, __BinaryParser serParser, Boolean fCheck, Boolean isCrossAppDomain, IMethodCallMessage methodCallMessage)
CompilerResultsLog: at System.Runtime.Serialization.Formatters.Binary.BinaryFormatter.Deserialize(Stream serializationStream, HeaderHandler handler, Boolean fCheck, Boolean isCrossAppDomain, IMethodCallMessage methodCallMessage)
CompilerResultsLog: at Tools.DotNETCommon.BinaryFormatterUtils.Load[T](FileReference Location) in D:\Build++UE4\Sync\Engine\Saved\CsTools\Engine\Source\Programs\DotNETCommon\DotNETUtilities\BinaryFormatterUtils.cs:line 27
CompilerResultsLog: at UnrealBuildTool.BuildMode.GetActionsForTarget(BuildConfiguration BuildConfiguration, TargetDescriptor TargetDescriptor, TargetMakefile Makefile) in D:\Build++UE4\Sync\Engine\Saved\CsTools\Engine\Source\Programs\UnrealBuildTool\Modes\BuildMode.cs:line 551
CompilerResultsLog: at UnrealBuildTool.BuildMode.Build(List`1 TargetDescriptors, BuildConfiguration BuildConfiguration, ISourceFileWorkingSet WorkingSet, BuildOptions Options, FileReference WriteOutdatedActionsFile) in D:\Build++UE4\Sync\Engine\Saved\CsTools\Engine\Source\Programs\UnrealBuildTool\Modes\BuildMode.cs:line 244
CompilerResultsLog: at UnrealBuildTool.BuildMode.Execute(CommandLineArguments Arguments) in D:\Build++UE4\Sync\Engine\Saved\CsTools\Engine\Source\Programs\UnrealBuildTool\Modes\BuildMode.cs:line 192
CompilerResultsLog: at UnrealBuildTool.UnrealBuildTool.Main(String] ArgumentsArray) in D:\Build++UE4\Sync\Engine\Saved\CsTools\Engine\Source\Programs\UnrealBuildTool\UnrealBuildTool.cs:line 517

Looks like your Build.cs file is out of wack :frowning: . Could there be a dependency/library/include folder that could be incorrect?