How can I insert 3 columns at the top and 1 row at the bottom in a section? It was possible in version 5.5.7, but how can I do it now in the new version 6.3.1?

• Site: https://osteopata.giuseppecento.eu/
• The Joomla version is 5.4.3
• The template version is: Doctor version 3.0.1
• The SP PageBuilder version is 6.3.1

I attach a screenshot: https://osteopata.giuseppecento.eu/error/image13.png - ver. 5.5.7 https://osteopata.giuseppecento.eu/error/image14.png - ver. 6.3.1