on my multisite the pagebuilder does no longer work after update to 4.9. In the page-editing esction the tab is no longer available and the editor does not no longer show rows and columns. Looks like it does not load.
PHP 7.0.24, Apache, WP 4.9
Rollback to 4.8.3 and it works again. I can’t reproduce this on single installations.
Any solution for your great product?