More than one header issue - laravel

Question

<?php namespace App\Http\Controllers\Auth;
use App\Http\Controllers\Controller;
use App\Http\Requests\RegisterRequest;
use Illuminate\Contracts\Auth\Guard;
use Illuminate\Contracts\Auth\Registrar;
use Illuminate\Foundation\Auth\AuthenticatesAndRegistersUsers;
use App\Http\Requests\LoginRequest;
use Illuminate\Support\Facades\Auth;
use Illuminate\Support\Facades\Redirect;
use Illuminate\Support\Facades\URL;
class AuthController extends Controller {
/*
|--------------------------------------------------------------------------
| Registration & Login Controller
|--------------------------------------------------------------------------
|
| This controller handles the registration of new users, as well as the
| authentication of existing users. By default, this controller uses
| a simple trait to add these behaviors. Why don't you explore it?
|
*/
use AuthenticatesAndRegistersUsers;
/**
* For redirect after registeration
* #return mixed
*/
public function redirectPath()
{
// return property_exists($this, 'redirectTo') ? $this->redirectTo : '/user/profile/';
//return property_exists($this, 'redirectTo') ? $this->redirectTo : '/';
return Redirect::intended('/');
}
/**
* Create a new authentication controller instance.
*
* #param \Illuminate\Contracts\Auth\Guard $auth
* #param \Illuminate\Contracts\Auth\Registrar $registrar
* #return \App\Http\Controllers\Auth\AuthController
*/
public function __construct(Guard $auth, Registrar $registrar)
{
$this->auth = $auth;
$this->registrar = $registrar;
$this->middleware('guest', ['except' => 'getLogout']);
}
/**
* Handle a login request to the application.
*
* #param LoginRequest $request
* #return Response
*/
public function postLogin(LoginRequest $request)
{
if ($this->auth->attempt($request->only('email', 'password')))
{
if(Auth::user()->is_admin)
return redirect('/admin');
else {
return Redirect::intended('/');
}
}
return redirect('auth/login')->withErrors([
'email' => 'The credentials you entered did not match our records. Try again?',
]);
}
}
I am redirecting a user to an intended url after signup but i get the following error.
Header may not contain more than a single header, new line detected
This is the code in the AuthController.
public function redirectPath()
{
return Redirect::intended('/');
}
And the following is the code in the Authenticate class.
public function handle($request, Closure $next)
{
if ($this->auth->guest())
{
if ($request->ajax())
{
return response('Unauthorized.', 401);
}
else
{
return redirect()->guest('auth/register');
}
}
return $next($request);
}
I am using laravel 5