Mono.exe can not be found in stand-alone.

Hello,
I am making a game in which a player can type his own script and play it runtime. It works perfectly fine in Unity Editor but when i try building the game and run the script i get an error which i can’t solve. I hope you guys can help me.
My project is set:
Scripting Backend: Mono
Api: .NET 4.x

public void PlayScript()
    {
        if (compilationWindow.activeSelf == true)
            return;

        StringBuilder source = new StringBuilder();
        source.Append("using UnityEngine;\nusing SplitAndMerge;\npublic class PlayersCode{\npublic static void Run(){\nSplitAndMerge.Program.MainUnity(new string []{\"\n");

        source.Append(scriptText.text.Replace("\u0022", "\u005c\u0022"));
        source.Append("\"});}}");

        var assembly = Kompiluj(source.ToString().Replace("\n", ""));
        var method = assembly.GetType("PlayersCode").GetMethod("Run");
        var del = (Action)Delegate.CreateDelegate(typeof(Action), method);
        del.Invoke();
        showCompilationError();


    }
........
 private Assembly Kompiluj(string kod)
    {
        var provider = new CSharpCodeProvider();
        var param = new CompilerParameters()
        {
            GenerateExecutable = false,
            GenerateInMemory = true
        };
        //standardowe assembly z projektu itp
        foreach (var assembly in AppDomain.CurrentDomain.GetAssemblies())
        {
            param.ReferencedAssemblies.Add(assembly.Location);
        }
        //dodatkowe assembly
        param.ReferencedAssemblies.Add("System.dll");
        param.ReferencedAssemblies.Add("Assets/Resources/cscs.dll");



        var results = provider.CompileAssemblyFromSource(param, kod);

        Debug.Log(results.Errors.Count);
        if (results.Errors.Count > 0)
        {
            foreach (CompilerError CompErr in results.Errors)
            {
                Debug.Log(
                     "Line number " + CompErr.Line +
                     ", Error Number: " + CompErr.ErrorNumber +
                     ", '" + CompErr.ErrorText + ";" +
                     Environment.NewLine + Environment.NewLine);
            }
        }
        return results.CompiledAssembly;

    }

I tried creating the folder there and i copy pasted files from unity, it “worked” but i still got another error :
Exception: Compiler failed to produce the assembly. Output: ‘’
at Microsoft.CSharp.CSharpCodeGenerator.FromFileBatch

Used roslyn instead and it works :wink: