Action TvchannelsController::ch() could not be found, or is not accessible. 📋

Cake\Controller\Exception\MissingActionException
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        $request $this->request;
        $action $request->getParam('action');
        if (!$this->isAction($action)) {
            throw new MissingActionException([
                'controller' => $this->name 'Controller',
                'action' => $request->getParam('action'),
                'prefix' => $request->getParam('prefix') ?: '',
                'plugin' => $request->getParam('plugin'),

If you want to customize this error message, create templates/Error/error500.php