Opening Unity EXE

Hello, I need some help. I’ve checks the forums and followed several different methods to get this to work but it’s not.

I have a Unity Windows App 64Bit with IL2CPP set. This is my Lobby. I have another Unity project called Admin (Admin.exe) that I want to launch when the player clicks the lobby admin button.

Below is my last attempt of code. Any help is greatly appreciated.

 Process myProcess = new Process();
 string path = "D:\\repos\\LLG\\Admin\\";
 myProcess.StartInfo.Arguments =  path;
 myProcess.StartInfo.FileName = "Admin.exe";
 myProcess.Start();

I can successfully launch like notepad but nothing else seems to work.

thanks
-llg