You don’t need a read more excerpt plugin for WordPress if you want to customize or replace the default […]
You may use the PHP code below. On line 4 you can insert anything you want. You may put CSS id, class, change the text, or insert image.
The code above works by adding a filter on WordPress excerpt function. If the read more link is not working, you need to check if the function has no syntax error and test if the loop is working.