GCT messes up Appearance –> Editor

We used Generate Child Theme to create a child instance of Twenty Twentyfour. The installation went fine. But the WP Editor is now dead. Going to Appearance –> Editor results in a blank screen that seems to hang. When reactivating the parent, everything is fine. When activating the child, the Edit screen is dead. The PHP code that was automatically created reads: <?php /* This is the child theme for Twenty Twenty-Four theme, generated with Generate Child Theme plugin by catchthemes. * (Please see https://developer.wordpress.org/themes/advanced-topics/child-themes/#how-to-create-a-child-theme ) */ add_action( ‘wp_enqueue_scripts’, ‘my_theme_enqueue_styles’ ); function my_theme_enqueue_styles() { wp_enqueue_style( ‘parent-style’, get_template_directory_uri() . ‘/style.css’ ); wp_enqueue_style( ‘child-style’, get_stylesheet_directory_uri() . ‘/style.css’, array(‘parent-style’) ); } Please advise.