fixed

rowers/views/racesviews.py

@@ -1064,7 +1064,7 @@ def virtualevents_view(request):
     if nearby and lat_lon is not None:  # pragma: no cover
         races = getnearestraces(lat_lon, races)
 
-    if participate:
+    if participate and r is not None:
         ress = VirtualRaceResult.objects.filter(userid=r.id).order_by("-race__evaluation_closure")
         races = [res.race for res in ress if res.race is not None]