Preloader is null for spigot users

worldedit-core/src/main/java/com/sk89q/worldedit/command/util/annotation/Preload.java

@@ -33,8 +33,10 @@ public @interface Preload {
             public void preload(Actor actor, InjectedValueAccess context) {
                 World world = context.injectedValue(Key.of(EditSession.class)).get().getWorld();
                 Preloader preloader = Fawe.imp().getPreloader(true);
+                if (preloader != null) {
                     preloader.update(actor, world);
                 }
+            }
         },
 
         NEVER {};