src/de/steamwar/bungeecore/tablist/TablistPart.java

@@ -38,7 +38,11 @@ interface TablistPart {
     class Item {
 
         public static Property[] playerProperties(ProxiedPlayer player) {
-            return ((InitialHandler) player.getPendingConnection()).getLoginProfile().getProperties();
+            InitialHandler handler = (InitialHandler) player.getPendingConnection();
+            if(handler == null)
+                return new Property[0];
+
+            return handler.getLoginProfile().getProperties();
         }
 
         private final UUID uuid;