Index: binary-improvements/MapRendering/Web/API/GetLandClaims.cs
===================================================================
--- binary-improvements/MapRendering/Web/API/GetLandClaims.cs	(revision 446)
+++ binary-improvements/MapRendering/Web/API/GetLandClaims.cs	(revision 448)
@@ -50,5 +50,5 @@
 				claimOwners.Add (owner);
 
-				owner.Add ("steamid", new JSONString (kvp.Key.PlatformId.CombinedString));
+				owner.Add ("steamid", new JSONString (kvp.Key.PlatformId?.CombinedString ?? ""));
 				owner.Add ("crossplatformid", new JSONString (kvp.Key.CrossPlatformId?.CombinedString ?? ""));
 				owner.Add ("claimactive", new JSONBoolean (kvp.Key.LandProtectionActive));