Failure generating network code, when I create script file.

So, Like in subject. When I create whatever script file, shows up Error: "Faulure generating network code". If I open up console, see that:

"UNetWeaver error: Exception :System.BadImageFormatException: Format of the executable (.exe) or library (.dll) is invalid. at Mono.Cecil.PE.ImageReader.ReadImage () [0x00000] in :0 at Mono.Cecil.PE.ImageReader.ReadImageFrom (System.IO.Stream stream) [0x00000] in :0 at Mono.Cecil.ModuleDefinition.ReadModule (System.IO.Stream stream, Mono.Cecil.ReaderParameters parameters) [0x00000] in :0 at Mono.Cecil.ModuleDefinition.ReadModule (System.String fileName, Mono.Cecil.ReaderParameters parameters) [0x00000] in :0 at Mono.Cecil.AssemblyDefinition.ReadAssembly (System.String fileName, Mono.Cecil.ReaderParameters parameters) [0x00000] in :0 at Unity.UNetWeaver.Weaver.Weave (System.String assName, IEnumerable`1 dependencies, IAssemblyResolver assemblyResolver, System.String unityEngineDLLPath, System.String unityUNetDLLPath, System.String outputDir) [0x00041] in /Users/builduser/buildslave/unity/build/Extensions/Networking/Weaver/UNetWeaver.cs:1715 at Unity.UNetWeaver.Weaver.WeaveAssemblies (IEnumerable`1 assemblies, IEnumerable`1 dependencies, IAssemblyResolver assemblyResolver, System.String outputDir, System.String unityEngineDLLPath, System.String unityUNetDLLPath) [0x0006e] in /Users/builduser/buildslave/unity/build/Extensions/Networking/Weaver/UNetWeaver.cs:1843 UnityEngine.Debug:LogError(Object) Unity.UNetWeaver.Log:Error(String) (at /Users/builduser/buildslave/unity/build/Extensions/Networking/Weaver/Program.cs:20) Unity.UNetWeaver.Weaver:WeaveAssemblies(IEnumerable`1, IEnumerable`1, IAssemblyResolver, String, String, String) (at /Users/builduser/buildslave/unity/build/Extensions/Networking/Weaver/UNetWeaver.cs:1851) Unity.UNetWeaver.Program:Process(String, String, String, String[], String[], IAssemblyResolver, Action`1, Action`1) (at /Users/builduser/buildslave/unity/build/Extensions/Networking/Weaver/Program.cs:34) UnityEditor.Scripting.Serialization.Weaver:WeaveUnetFromEditor(String, String, String, String, Boolean)"

And that:

"Failure generating network code. UnityEditor.Scripting.Serialization.Weaver:WeaveUnetFromEditor(String, String, String, String, Boolean)"

I created, new clear project and the same.