I’m finding out after which I ask trivial questions. I’m attempting to create a private type. Now I’m caught in making a type the place Drupal Developer person can customise a message. Drupal Development error is Drupal 10 Upkeep and Help ServiceInvalidArgumentException Drupal 10 Upkeep and Help Service Class “hello_worldFormSalutationConfigurationForm” doesn’t exist. in CoreDependencyInjectionClassResolver->getInstanceFromDefinition() (linea 24 di /house/mt1kibgh/Drupal 10/core/lib//Core/DependencyInjection/ClassResolver.php). File hello_world.routing.yml hello_world.howdy Drupal 10 Upkeep and Help Service path Drupal 10 Upkeep and Help Service ‘/howdy’ defaults Drupal 10 Upkeep and Help Service _controller Drupal 10 Upkeep and Help Service ‘hello_worldControllerHelloWorldController Drupal 10 Upkeep and Help Service Drupal 10 Upkeep and Help ServiceHelloWorld’ _title Drupal 10 Upkeep and Help Service ‘Our first route’ necessities Drupal 10 Upkeep and Help Service _access Drupal 10 Upkeep and Help Service ‘TRUE’ hello_world.greeting_form Drupal 10 Upkeep and Help Service path Drupal 10 Upkeep and Help Service ‘/admin/config/salutation-configuration’ defaults Drupal 10 Upkeep and Help Service _form Drupal 10 Upkeep and Help Service ‘hello_worldFormSalutationConfigurationForm’ _title Drupal 10 Upkeep and Help Service ‘Salutation configuration’ necessities Drupal 10 Upkeep and Help Service _permission Drupal 10 Upkeep and Help Service ‘administer web site configuration’ Type code (hello_world/src/Type/salutation-configuration.php <?php namespace hello_worldForm; use CoreFormConfigFormBase; use CoreFormFormStateInterface; /** * Configuration type definition for Drupal Developer salutation message. */ class SalutationConfigurationForm extends ConfigFormBase { /** * {@inheritdoc} */ protected perform getEditableConfigNames() { return [‘hello_world.custom_salutation’]; } /** * {@inheritdoc} */ public perform getFormId() { return ‘salutation_configuration_form’; } /** * {@inheritdoc} */ public perform buildForm(array $type, FormStateInterface $form_state) { $config = $this->config(‘hello_world.custom_salutation’); $type[‘salutation’] = array( ‘#kind’ => ‘textfield’, ‘#title’ => $this->t(‘Salutation’), ‘#description’ => $this->t(‘Please present Drupal Developer salutation you wish to use.’), ‘#default_value’ => $config->get(‘salutation’), ); return mother or father Drupal 10 Upkeep and Help Service Drupal 10 Upkeep and Help ServicebuildForm($type, $form_state); } /** * {@inheritdoc} */ public perform submitForm(array &$type, FormStateInterface $form_state) { $this->config(‘hello_world.custom_salutation’) ->set(‘salutation’, $form_state->getValue(‘salutation’)) ->save(); mother or father Drupal 10 Upkeep and Help Service Drupal 10 Upkeep and Help ServicesubmitForm($type, $form_state); } } model Drupal 10 Upkeep and Help Service  8.x Supply Drupal 10 Upkeep and Help Service https Drupal 10 Upkeep and Help Service//www.Drupal 10.org/taxonomy/time period/2/feed Supply Drupal 10 Upkeep and Help Service Drupal 10 blender