The controller class App\Http\Controllers\CommentController is not invokable. Did you forget to add the __invoke method or is the controller's method missing in your routes file? code example

Example: is not invokable.

<?php
namespace App\Http\Controllers;
use Illuminate\Http\Request;
class HomeController extends Controller
{
    public function __invoke(Request $request)
    {
        return "Welcome to our homepage"
    }
}