Could not cast transparent proxy to type

public static ScriptDomain Load(string path)
{
    if (!Path.IsPathRooted(path))
    {
        path = Path.Combine(Path.GetDirectoryName(Assembly.GetExecutingAssembly().Location), path);
    }
 
    // Create AppDomain
    var setup = new AppDomainSetup();
    setup.ApplicationBase = path;
    setup.ShadowCopyFiles = "true";
    setup.ShadowCopyDirectories = path;
 
    var appdomain = AppDomain.CreateDomain("ScriptDomain_" + (path.GetHashCode() * Environment.TickCount).ToString("X"), null, setup, new System.Security.PermissionSet(System.Security.Permissions.PermissionState.Unrestricted));
    appdomain.InitializeLifetimeService();
 
    Log("[DEBUG]", "Path ", path);
    Log("[DEBUG]", "Location ", typeof(ScriptDomain).Assembly.Location);
    Log("[DEBUG]", "FullName ", typeof(ScriptDomain).FullName);
 
    ScriptDomain scriptdomain = null;
 
    try
    {
        scriptdomain = (ScriptDomain)(appdomain.CreateInstanceFromAndUnwrap(typeof(ScriptDomain).Assembly.Location, typeof(ScriptDomain).FullName));
    }
    catch (Exception ex)
    {
        Log("[ERROR]", "Failed to create script domain':", Environment.NewLine, ex.ToString());
 
        AppDomain.Unload(appdomain);
 
        return null;
    }
 
    ...