Empty compiler error - IncrementalCompiler.xml file is being used by other process

[SirIntruder]

Hello guys
Ever since I added this to my project (5.6 Unity) I had empty compiler error issues
I opened up logs and this is error found:

2017-04-04 23:55:12.7345 ERROR|Client|Failed in loading settings.|System.IO.IOException: The process cannot access the file 'C:\Git\sim\Compiler\IncrementalCompiler.xml' because it is being used by another process.
at System.IO.__Error.WinIOError(Int32 errorCode, String maybeFullPath)
at System.IO.FileStream.Init(String path, FileMode mode, FileAccess access, Int32 rights, Boolean useRights, FileShare share, Int32 bufferSize, FileOptions options, SECURITY_ATTRIBUTES secAttrs, String msgPath, Boolean bFromProxy, Boolean useLongPath, Boolean checkHost)
at System.IO.FileStream..ctor(String path, FileMode mode, FileAccess access, FileShare share, Int32 bufferSize, FileOptions options, String msgPath, Boolean bFromProxy)
at System.IO.FileStream..ctor(String path, FileMode mode)
at IncrementalCompiler.Settings.Load()
at IncrementalCompiler.Program.RunAsClient(String[] args)