Signavio process definition cannot be opened due to missing Task name input

Hi,

enclosed process definition was designed in Signavio designer but cannot be opened in Business Central designer. What I know for sure is that it lacks Task name input for user tasks and that's why it fails with NPE. After I tried to fiddle with it a little bit to add task inputs manually there were some other issues with Signavio-specific elements but not sure if the issue was really with them.

I also attached the stack trace from the server log.