Check for null map.

src/main/java/com/drtshock/playervaults/vaultmanagement/Serialization.java

@@ -25,11 +25,7 @@ import org.json.simple.JSONArray;
 import org.json.simple.JSONObject;
 import org.json.simple.JSONValue;
 
-import java.util.ArrayList;
+import java.util.*;
-import java.util.Collections;
-import java.util.HashMap;
-import java.util.List;
-import java.util.Map;
 import java.util.Map.Entry;
 
 /**
@@ -42,6 +38,12 @@ public class Serialization {
     @SuppressWarnings("unchecked")
     public static Map<String, Object> toMap(JSONObject object) {
         Map<String, Object> map = new HashMap<>();
+
+        // Weird case of bad meta causing null map to be passed here.
+        if (object == null) {
+            return map;
+        }
+
         for (Object key : object.keySet()) {
             map.put(key.toString(), fromJson(object.get(key)));
         }

src/main/java/com/drtshock/playervaults/vaultmanagement/UUIDVaultManager.java

@@ -17,6 +17,7 @@ import java.util.List;
 import java.util.Map;
 import java.util.UUID;
 import java.util.concurrent.ConcurrentHashMap;
+import java.util.logging.Level;
 
 /**
  * Class to handle vault operations with new UUIDs.
@@ -312,7 +313,9 @@ public class UUIDVaultManager {
                 }
                 try {
                     yaml.save(file);
-                } catch (IOException ignored) {
+                } catch (Exception e) {
+                    PlayerVaults.getInstance().getLogger().log(Level.SEVERE, "Failed to save vault file for: " + holder.toString());
+                    e.printStackTrace();
                 }
             }
         }.runTaskAsynchronously(PlayerVaults.getInstance());