Preloader is null for spigot users

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

@@ -33,7 +33,9 @@ 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);
-                preloader.update(actor, world);
+                if (preloader != null) {
+                    preloader.update(actor, world);
+                }
             }
         },