Call to undefined method Illuminate\Http\Response::view() - laravel

Question

I have Laravel installed and now I keep getting this error everytime I run composer update, php artisan routes, or any composer commands:
Call to undefined method Illuminate\Http\Response::view()
I already searched the internet and tried the following suggested solutions so far and nothing worked:
1) A lot of suggested answer on the net says to delete vendor/compiled.php and run the composer update again. But when I went to vendor folder, I cannot find any compiled.php file there. The only file that exists there is: autoload.php
2) I also tried searching for compiled.php inside storage/framework/ folder and nothing there neither.
3) I even tried running optimize with the --force flag php artisan optimize --force and it shows the same error as above.
4) I looked at boostrap/autoload.php for compiled path and it says $compiledPath = __DIR__.'/cache/compiled.php'; I can only see the boostrap/cache folder and that doesnt have this file.
What is wrong here? I am new to Laravel and I dont understand what this error means. Going by the answers out there, I am going around looking for compiled.php to delete and run the update again and I dont even know if that is the right solution for it. Can someone help me here please on how do I proceed troubleshooting this?
I have Laravel 5.1.6 installed after the update I did yesterday. I also ran the composer dumpautoload command today and I wonder if this error started happening after that. Now any commands in composer is giving the above error.
EDIT:
Now even my browser view of the site is showing the error:
FatalErrorException in Facade.php line 210:
Call to undefined method Illuminate\Foundation\Application::missing()
I also tried deleting the complete vendor folder and composer.lock, and re-ran composer install. Towards the end of the installation when generating autoload files, it showed this error again and stopped.
EDIT 2:
#NehalHasnayeen in the comments got it absolutely right. This error was caused due to app calling the view method on Response class, while the response class had no view method. Once I removed that from my route, it worked. This is my route file:
Route::get('/', function () {
return view('index');
//return View::make('index');
});
Route::group(['prefix' => 'api'], function()
{
Route::resource('authenticate', 'AuthenticateController', ['only' => ['index']]);
Route::post('authenticate', 'AuthenticateController#authenticate');
});
// -------- THIS WAS CAUSING THE ISSUE - REMOVING THIS WORKED AFTER THAT ------
//App::missing(function($exception) {
// return view('index');
//});
It takes me to my final question, why was the catch-all route throwing this error? I read from here that adding the above will redirect all other route requests to index. What is the right method? Did it change in Laravel 5 or have I done something wrong?

Answer 1

For 1st error:
your app is calling view method on Response class, but response class has no view method, so find the file where it is calling this method & remove it & replace it with correct method
For 2nd error:
App::missing is for laravel 4 version, it is removed in laravel 5. To achieve the same in your app\exceptions\handler.php file add this in render method
public function render($request, Exception $e)
{
if ($e instanceof \Symfony\Component\HttpKernel\Exception\NotFoundHttpException) {
return response()->view('index', [], 404);
}
return parent::render($request, $e);
}