This article desribes an issue some customers have when upgrading an Ektron site with Pagebuilder functionality.
For example:
On the template, there is an icon for printing the page. After the upgrade, the script behind the icon does not trigger and therefore does not work anymore.
In the console, you can see this message that was not there before the upgrade.
JQMIGRATE: Migrate is installed with logging active, version 3.0.0