При загрузке аватара - ошибка Internal Server Error

The server encountered an internal error or misconfiguration and was unable to complete your request.
 
Please contact the server administrator at webmaster@servgame.ru to inform them of the time this error occurred, and the actions you performed just before this error.
 
More information about this error may be available in the server error log.

<?php
 
namespace App\Http\Controllers;
 
use Illuminate\Http\Request;
use App\Http\Requests;
use Auth;
use Image;
 
class UserController extends Controller
{
    //
    public function profile(){
        return view('profile', array('user' => Auth::user()) );
    }
 
    public function update_avatar(Request $request){
 
        // Handle the user upload of avatar
        if($request->hasFile('avatar')){
            $avatar = $request->file('avatar');
            $filename = time() . '.' . $avatar->getClientOriginalExtension();
            Image::make($avatar)->resize(300, 300)->save( public_path('/images/avatars/' . $filename ) );
 
            $user = Auth::user();
            $user->avatar = $filename;
            $user->save();
        }
 
        return view('profile', array('user' => Auth::user()) );
 
    }
}