error in laravel with post method

Hello, I find myself making a record in Laravel but when I click on a button to open the record view, I get the following error:

The GET method is not supported for this route. Supported methods: POST.

The view code is as follows:

            <form class="register-form" action="{{ url('/registrar') }}" method="POST">
          {{ csrf_field() }}
          <div class="form-group">
            <label for="exampleInputUsername" class="text-uppercase">Usuario</label>
            <input type="text" class="form-control" name="usuario" placeholder="Ingrese el usuario">
          <div class="form-group">
            <label for="exampleInputPassword1" class="text-uppercase">Contraseña</label>
            <input type="password" name="password" class="form-control" placeholder="Ingrese la contraseña">
          </div>
    <div class="form-check">
    <button type="submit" class="btn btn-register float-right">Registrar</button>
  </div>

</form>

I have the route in the web.php like this

Route::post('/registrar','registroController@RegistroCliente')->name('registro');

And the code in my controller is as follows:

<?php

namespace App\Http\Controllers;

use Illuminate\Http\Request;
use Illuminate\Support\Facades\Auth;
use App\tbl_usuario;

class loginController extends Controller
{
    public function RegistroCliente(Request $request)
    {
        $validacion = Validator::make($request->all(),
        [
            'usuario' => 'required|max:50',
            'password' => 'required|min:6'
        ]);

        if($validacion->fails())
        {
            return redirect('/#register')
                ->withInput()
                ->withErrors($validacion);
        }

        $user=new tbl_usuario();
        $user->usuario=$request->usuario;
        $user->password=$request->password;
    }

}