unity Could not fetch error messages from compilerInvalidOperationException

UnityでCould not fetch error messages from compilerInvalidOperationExceptionが発生しました。MonoDeveloperでファイルのディレクトリを移動したせいです。
以下エラーログ。
Could not fetch error messages from compilerInvalidOperationException: The process must exit before getting the requested information.
System.Diagnostics.Process.get_ExitCode ()
(wrapper remoting-invoke-with-check) System.Diagnostics.Process:get_ExitCode ()
UnityEditor.Utils.Program.get_ExitCode () (at /Users/builduser/buildslave/unity/build/Editor/Mono/Utils/Program.cs:104)
UnityEditor.Scripting.Compilers.ScriptCompilerBase.CompilationHadFailure () (at /Users/builduser/buildslave/unity/build/Editor/Mono/Scripting/Compilers/ScriptCompilerBase.cs:105)
UnityEditor.Scripting.Compilers.ScriptCompilerBase.DumpStreamOutputToLog () (at /Users/builduser/buildslave/unity/build/Editor/Mono/Scripting/Compilers/ScriptCompilerBase.cs:116)
UnityEditor.Scripting.Compilers.ScriptCompilerBase.GetCompilerMessages () (at /Users/builduser/buildslave/unity/build/Editor/Mono/Scripting/Compilers/ScriptCompilerBase.cs:98)
どうやらUnityとMonoDeveloperでのメッセージがやり取りできないとこのこと。

解決策

UnityとMonoDeveloperを再起動。