Why does OpenCart 3 swear at a custom module?

Question

opencart

Good day to all. I need your help. I installed my module on opencart 3. It appeared in the admin panel and there is an opportunity to activate it. However, when you move on to editing opencart, you get an error in which only one of the files I added looms.

Fatal error: Uncaught exception 'Exception' with message 'Error: Could not load model extension/module!' in E:\OSPanel\domains\opencart.loc\system\storage\modification\system\engine\loader.php:60
Stack trace:
#0 E:\OSPanel\domains\opencart.loc\admin\controller\extension\module\<b>vantage.php</b>(16): Loader->model('extension/modul...') 
#1 [internal function]: ControllerExtensionModuleVantage->index() 
#2 E:\OSPanel\domains\opencart.loc\system\storage\modification\system\engine\action.php(51): call_user_func_array(Array, Array) 
#3 E:\OSPanel\domains\opencart.loc\admin\controller\startup\router.php(26): Action->execute(Object(Registry), Array) 
#4 [internal function]: ControllerStartupRouter->index() 
#5 E:\OSPanel\domains\opencart.loc\system\storage\modification\system\engine\action.php(51): call_user_func_array(Array, Array) 
#6 E:\OSPanel\domains\opencart.loc\system\engine\router.php(34): Action->execute(Object(Registry)) 
#7 E:\OSPanel\domains\opencart.loc\system\engine\router.php(29): Router->execute(Object(Action)) #8 E:\OSPanel\ in E:\OSPanel\domains\opencart.loc\system\storage\modification\system\engine\loader.php on line 60

Code part:

<?php

class ControllerExtensionModuleVantage extends Controller {
  
  private $error = array(); 
  
  public function index() {   

    //Load language file
    $this->load->language('extension/module/vantage');

    //Set title from language file
    $this->document->setTitle($this->language->get('heading_title'));
    
    //Load settings model
    $this->load->model('extension/module');
    
    //Save settings
    if (($this->request->server['REQUEST_METHOD'] == 'POST') && $this->validate()) {
      if (!isset($this->request->get['module_id'])) {
        $this->model_extension_module->addModule('vantage', $this->request->post);
      } else {
        $this->model_extension_module->editModule($this->request->get['module_id'], $this->request->post);
      }
      $this->session->data['success'] = $this->language->get('text_success');
      $this->response->redirect($this->url->link('extension/extension', 'token=' . $this->session->data['token'], 'SSL'));
    }

Answer 1

$this->load->model('extension/module');

Invalid model reference. It should most likely be:
$this->load->model('extension/module/vantage'); Well, or where do you have the file with the model, check