Drag & drop exercises worked perfectly fine on version 5.0.0 but after installing the latest update 5.0.1 you can no longer drag the boxes. To test that the version was the issue, I published a course using version 5.0.1 and they were broken, uninstalled SmartBuilder completely and installed version 5.0.0 and without doing anything else updated the link and they worked again.

Thanks for reporting this. We have fixed the bug and released an update to SmartBuilder 5.0.1 with the fix (Build: 202309121729). If you update SmartBuilder and republish your lesson the problem should be resolved.