i follow this learning path https://gettingstarted.mendixcloud.com/link/module/328/lecture/2543/11.5.5-Configuring-Your-Widget-in-Mendix-Studio-Pro in direction 2, I encounterd this errors. How can i solve it?
you need to do 2 things:
select the activity, right click and select error handling custom with rollback.
Select the flow pointing downwards, right click, select set as error handler