GanttProject: export issue (.gan export to pdf) no date bars

Whenever I export my gan file in to pdf file, only the tasks will show up and the date bars didn’t show up.

Check this exported .gan file, theres no date chart bar
GanttProjectSEII.pdf (88.0 KB)

@DmitryBarashev this is my .gan file GanttProjectSEII.gan (12.0 KB)

Please share the contents of the log file after exporting. Help > View log.