Multiantag Gamemode (#37783)

Co-authored-by: slarticodefast <161409025+slarticodefast@users.noreply.github.com>
Co-authored-by: Southbridge <7013162+southbridge-fur@users.noreply.github.com>
Co-authored-by: ScarKy0 <106310278+ScarKy0@users.noreply.github.com>

Content.Shared/EntityTable/EntitySelectors/GroupSelector.cs

@@ -26,6 +26,9 @@ public sealed partial class GroupSelector : EntityTableSelector
             children.Add(child, child.Weight);
         }
 
+        if (children.Count == 0)
+            return Array.Empty<EntProtoId>();
+
         var pick = SharedRandomExtensions.Pick(children, rand);
 
         return pick.GetSpawns(rand, entMan, proto, ctx);