TokenMismatchException in Edge and IE 11 with Laravel 5 App

I have developed a laravel 5 app which is working well on all other browsers except IE and Edge. I am getting TokenMismatchException on all form submits. I read this blog http://ift.tt/2bAKtF7

and implemented the following as an attempt to solve the issue but it still not working:

1. Created a Middleware

   namespace App\Http\Middleware;
   
   use Closure;
   
   class IeFix
   {
       /**
        * Handle an incoming request. Fix session error with Laravel on IE/Edge
        *
        *
        * @param  \Illuminate\Http\Request  $request
        * @param  \Closure  $next
        * @return mixed
        */
       public function handle($request, Closure $next)
       {
           $response = $next($request);
           $response->header('P3P', 'CP="IDC DSP COR ADM DEVi TAIi PSA PSD IVAi IVDi CONi HIS OUR IND CNT"');
           return $response;
       }
   }
   
   

   2. Added the class to the application's global HTTP middleware stack like below. protected $middleware = [ \Illuminate\Foundation\Http\Middleware\CheckForMaintenanceMode::class, \App\Http\Middleware\EncryptCookies::class, \Illuminate\Cookie\Middleware\AddQueuedCookiesToResponse::class, \Illuminate\Session\Middleware\StartSession::class, \Illuminate\View\Middleware\ShareErrorsFromSession::class, \App\Http\Middleware\VerifyCsrfToken::class, \App\Http\Middleware\IeFix::class, ]; But I still get same error on IE and Edge? What can I do to fix this?

via Chebli Mohamed