Target class [SecretController] does not exist. code example
Example 1: Target class [UserController] does not exist.
Note: don't forget to import (use) your controller in the routes(web.php) file at the top. Like:
use App\Http\Controllers\PagesController;
Route::get('/',[PagesController::class, 'index']);
Example 2: Target class [Controller] does not exist.
//accessing any function in the controller (this is web.php file)
use App\Http\Controllers\PostsController;
Route::get('/post', 'App\Http\Controllers\PostsController@index');