Overview of the Issue
There is an issue when using Avada theme’s Fusion Builder on WordPress 5.0 version and WPML is active.
When you edit a page created using the Fusion Builder it displays the following message:
Your page content could not be displayed as a Fusion Builder layout. Most likely that means, there is some invalid markup or shortcode in it.
Workaround
This issue is fixed. Updating to the latest version solves it on your site, so you only need this workaround if you can’t update yet.
This issue has been reported to the core team.
In the meantime, installing the Classic Editor plugin (opens in a new tab) fixes this issue.