First step is debugging email_fellows_tasklist management command

submissions/management/commands/email_fellows_tasklist.py

@@ -28,13 +28,16 @@ class Command(BaseCommand):
             assignments_upcoming_deadline = assignments_ongoing.refereeing_deadline_within(days=7)
             if recs_to_vote_on or assignments_ongoing or assignments_to_consider or assignments_upcoming_deadline:
                 mail_sender = DirectMailUtil(
-                    'fellows/email_fellow_tasklist', delayed_processing=False,  # Render immediately, because m2m/querysets cannot be saved for later rendering.
+                    'fellows/email_fellow_tasklist',
+                    # Render immediately, because m2m/querysets cannot be saved for later rendering:
+                    delayed_processing=False,
+                    object=fellow,
                     fellow=fellow,
                     nr_potfels_to_vote_on=nr_potfels_to_vote_on,
                     recs_to_vote_on=recs_to_vote_on,
                     assignments_ongoing=assignments_ongoing,
                     assignments_to_consider=assignments_to_consider,
                     assignments_upcoming_deadline=assignments_upcoming_deadline)
-                mail_sender.send()
+                mail_sender.send_mail()
                 count += 1
         self.stdout.write(self.style.SUCCESS('Emailed {} fellows.'.format(count)))