LearnDash LMS - Certificate preview is missing in the Editor's Visual tab

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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 );