No supported encrypter found issue

When i post my form on my laravel (5.2) i get this when it has to return some value to the former page.

MY CONTROLLER

class WsRegisterController extends Controller{

public function register()
{
    $wsregistration = Input::all();
    $wsUserName = Input::get('name');
    $wsUserEmail = Input::get('email');
    $wsUserPassword = Input::get('password');

    /* Check if user is a bot */

    $wsrules = [
    // 'g-recaptcha-response' => 'required|recaptcha', capthcha
    'name'   => 'required|min:2|max:32',
    'email'  => 'required|email',
    'password' => 'required|alpha_num|min:8'
    ];

    $wsvalidator = Validator::make($wsregistration, $wsrules);

    if ($wsvalidator->passes()) {

        /* Check if the email address exits */

        $wsUser_count = User::where('email', '=', $wsUserEmail)->count();

        // return $wsUser_count; exit;

        if ( $wsUser_count > 1 ) {

            return Redirect::to('/test')->with(array('error_msg' => 'This email address exist, please use another email address.'));

        }
     }
   }
  }

So i tried stackoverflowing it with this link but it is still not working

CONFIG/APP.PHP FILE

/*
|--------------------------------------------------------------------------
| Encryption Key
|--------------------------------------------------------------------------
|
| This key is used by the Illuminate encrypter service and should be set
| to a random, 32 character string, otherwise these encrypted strings
| will not be safe. Please do this before deploying an application!
|
*/

'key' => env('o/tPhyhKmuLoJMWXZeV8b10OFoCT62z6WKuC3HO5Jbw='),// env('9TSL9BsEjZyoM9BjX9du0XaLnCDi4m4Z'),

'cipher' => 'AES-128-CBC',//'AES-256-CBC',

.ENV FILE

APP_KEY=base64:o/tPhyhKmuLoJMWXZeV8b10OFoCT62z6WKuC3HO5Jbw=
APP_URL=http://localhost

I even did this artisan command to generate new key php artisan key:generate please what did i do wrong @everyone.

No supported encrypter found error snapshot

via Chebli Mohamed