Fix crash

tournaments/models/tournament.py

@@ -378,7 +378,6 @@ class Tournament(models.Model):
             }
 
     def broadcasted_matches_and_group_stages(self):
-
         matches = []
         group_stages = []
 
@@ -388,14 +387,15 @@ class Tournament(models.Model):
         else:
             # last_started_match = self.first_unfinished_match()
             current_round = self.round_to_show()
-            previous_round = self.round_for_index(current_round.index + 1)
+            if current_round:
+                previous_round = self.round_for_index(current_round.index + 1)
 
-            if previous_round:
-                matches.extend(current_round.get_matches_recursive(True))
-                matches.extend(previous_round.get_matches_recursive(True))
-            else:
-                matches.extend(current_round.all_matches(True))
-                group_stages = self.live_group_stages()
+                if previous_round:
+                    matches.extend(current_round.get_matches_recursive(True))
+                    matches.extend(previous_round.get_matches_recursive(True))
+                else:
+                    matches.extend(current_round.all_matches(True))
+                    group_stages = self.live_group_stages()
 
         return matches, group_stages