Try this:
1. Copy this into a Text Editor ( or preferably an IDE application ) :
<?php
/*
Plugin Name: Remove More Jump
Plugin URI: https://www.assemblewp.com
Description: Remove jump link from read more
Version: 0.1
Author: diggeddy
Author URI: https://www.assemblewp.com
License: GPL2
License URI: https://www.gnu.org/licenses/gpl-2.0.html
Text Domain: assemblewp
Domain Path: /languages
*/
add_filter( 'generate_more_jump', '__return_false' );
2. Save the file as: remove-more.php
into a folder named Remove more
.
3. Compress the folder into a .zip
file.
4. Install it as a plugin on your site.
After doing so clear any caches on the site.