Fixed some item errors on drop

CHANGELOG.md

@@ -1,6 +1,7 @@
 # Changelog
 
 ## 1.3.4 - ?
+- Fixed some item errors on drop.
 - Added FoV English Opportunities usage.
 - Compendiums :
   - Added missing Mantis "Storm Fleet Tide Seer" school techniques : "Storm Surge" and "Eye of the Storm".

system/scripts/item.js

@@ -4,7 +4,7 @@ export class ItemL5r5e extends Item {
      * @returns {Collection<BaseItem>}
      */
     get items() {
-        return this.data.data.items || null;
+        return this.data.data.items || new Map();
     }
 
     /**