How open next task after complete task

Hi Team,

When user complete current task , he want immediately open next task to edit his job. BPM modeler process used Jmix screen.
Please help me!
Thank you!

This is my code:

@Subscribe("startProcessBtn")
public void onStartProcessBtnClick(Button.ClickEvent event) {

   String taskId = processFormContext.processStarting()
            .withBusinessKey("XXXXXX")
            .start().getId();

    Task nextTask = taskService.createTaskQuery().taskId(taskId).singleResult();
    Screen screen = processFormScreens.createTaskProcessForm(nextTask , this);
    screen.show();

    closeWithDefaultAction();

}

But "nextTask " is null.

I got it. This is working code:
My mistake when processStarting() return “processId”, is not “taskId”

    String processId = processFormContext.processStarting()
            .withBusinessKey("XXXX")
            .start().getId();

    Task nextTask = taskService.createTaskQuery()
             .processInstanceId(processId)
            .active()
            .orderByTaskCreateTime()
            .desc()
            .list()
            .get(0);

    Screen screen = processFormScreens.createTaskProcessForm(nextTask,this );
    screen.show();

Thanks All!