Deprecated (16384) : Colon prefixed route placeholders like `:foo` are deprecated. Use braced placeholders like `{foo}` instead. /var/www/offertegiocattoli4/vendor/cakephp/cakephp/src/Routing/Route/Route.php, line: 303 You can disable all deprecation warnings by setting `Error.errorLevel` to `E_ALL & ~E_USER_DEPRECATED`. Adding `vendor/cakephp/cakephp/src/Routing/Route/Route.php` to `Error.ignoredDeprecationPaths` in your `config/app.php` config will mute deprecations from that file only. [in /var/www/offertegiocattoli4/vendor/cakephp/cakephp/src/Core/functions.php, line 318]
Warning (512) : Unable to emit headers. Headers sent in file=/var/www/offertegiocattoli4/vendor/cakephp/cakephp/src/Error/Renderer/HtmlErrorRenderer.php line=37 [in /var/www/offertegiocattoli4/vendor/cakephp/cakephp/src/Http/ResponseEmitter.php, line 71]
Warning (2) : Cannot modify header information - headers already sent by (output started at /var/www/offertegiocattoli4/vendor/cakephp/cakephp/src/Error/Renderer/HtmlErrorRenderer.php:37) [in /var/www/offertegiocattoli4/vendor/cakephp/cakephp/src/Http/ResponseEmitter.php, line 168]
Warning (2) : Cannot modify header information - headers already sent by (output started at /var/www/offertegiocattoli4/vendor/cakephp/cakephp/src/Error/Renderer/HtmlErrorRenderer.php:37) [in /var/www/offertegiocattoli4/vendor/cakephp/cakephp/src/Http/ResponseEmitter.php, line 197]
Error: Missing Controller

Missing Controller 📋

Cake\Http\Exception\MissingControllerException

Error Product.htmlController could not be found.

In the case you tried to access a plugin controller make sure you added it to your composer file or you use the autoload option for the plugin.

Suggestion Create the class Product.htmlController below in file: src/Controller/Product.htmlController.php

    <?php
    
namespace App\Controller;

    use 
App\Controller\AppController;

    class 
Product.htmlController extends AppController
    
{

    }
CORE/src/Controller/ControllerFactory.php at line 338 (edit)
     * @return \Cake\Http\Exception\MissingControllerException
     */
    protected function missingController(ServerRequest $request)
    {
        return new MissingControllerException([
            'controller' => $request->getParam('controller'),
            'plugin' => $request->getParam('plugin'),
            'prefix' => $request->getParam('prefix'),
            '_ext' => $request->getParam('_ext'),

If you want to customize this error message, create templates/Error/missing_controller.php