Null check

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

@@ -142,8 +142,10 @@ public class VaultManager {
         // In this case, players will lose items.
         if (deserialized.getContents().length > size) {
             for (ItemStack stack : deserialized.getContents()) {
+                if (stack != null) {
                     inventory.addItem(stack);
                 }
+            }
         } else {
             inventory.setContents(deserialized.getContents());
         }

src/main/resources/config.yml

@@ -29,7 +29,7 @@ economy:
 # Use material names. This does not work with ids.
 
 # Should we even use this? If left to false, the list won't do anything.
-blockitems: false
+blockitems: true
 
 # Only effective if the above option is true.
 blocked-items: