Using child theme, now custom CSS screen hangs

After activating a child theme (wp-content/themes/Newspaper-child), the Theme Panel > Custom Code > Custom CSS screen hangs upon saving. When I go back to using the parent theme, the issue resolves itself.

Is there a fix for this?

I am including the code for my child theme’s functions.php and style.css files.

Thanks, as always!

HANGING SCREEN – CUSTOM CSS:
https://ibb.co/YBFZRt5

FUNCTIONS.PHP

<?php
add_action( 'wp_enqueue_scripts', 'my_theme_enqueue_styles' );
function my_theme_enqueue_styles() {
$parent_style = 'Newspaper-style'; // This is 'twentyfifteen-style' for the Twenty Fifteen theme.
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 ),
wp_get_theme()->get('Version')
);
}
?>


STYLE.CSS

/*
Theme Name: Newspaper Child
Theme URI: http://xyz.com/newspaper-child/
Description: Newspaper Child
Author: XYZ, Inc.
Author URI: http://xyz.com
Template: Newspaper
Version: 1.0.0
License: N/A
License URI: N/A
Tags: news
Text Domain: newspaper-child
*/


• This topic was modified 7 years by bxp331.
• This topic was modified 7 years by bxp331.

UPDATE: All of the panels in the Theme Panel are hanging––not just the Custom CSS panel. The spinner spins ad infinitum.

Hope this helps diagnose the problem.

Thanks! Can you point me to documentation to how to set up the child themes in Newspaper 9.6? I assume this is not the same as the standard WP method. I couldn’t find that documentation easily.

FYI, I’m running the child theme using the standard WP method––creating a new folder for the theme called Newspaper-child, then going through the steps outlined in my original post.

Thanks again.