Hook form alter not working for node edit form

I have a content type called landing_page. If I edit an existing node in the admin /node/31/edit and I inspect the form I see id=”node-landing-page-edit-form”. I can’t get it to work to use hook_form_FORM_ID_alter()? I tried: function MYTHEME_form_node_landing_page_edit_form_alter(&$form, FormStateInterface &$form_state, $form_id) { $form[‘field_message’] = array( ‘#type’ => ‘item’, ‘#title’ => t(‘New article’), ‘#markup’ => t(‘Test…

Details