LearnDash LMS – Certificate preview is missing in the Editor’s Visual tab

Overview of the issue

When WPML is active, you aren’t able to preview LearnDash LMS certificates in the editor’s Visual tab.

We’re working on a fix for this issue. In the meantime, you can follow this workaround:

Backup your WordPress site files and database.

Using FTP, navigate to wp-content/plugins/sitepress-multilingual-cms/classes/class-wpml-translate-independently.php

Comment this line:

add_filter( 'tiny_mce_before_init', array( $this, 'add_tiny_mce_change_detection' ), 999, 1 );