fix

src/main/java/net/pietru/cookie_utils/setups/areaFillSetup.java

@@ -32,7 +32,7 @@ public class areaFillSetup extends Setup {
     }
 
     public static void register() {
-        setupCreator.registerSetupCreator("region", areaFillSetup::new);
+        setupCreator.registerSetupCreator("cubeFill", areaFillSetup::new);
     }
 
     @Override

src/main/java/net/pietru/cookie_utils/setups/setupCreator.java

@@ -8,6 +8,7 @@ public interface setupCreator {
     static void registerSetupCreators() {
         regionSetup.register();
         areaPermSetup.register();
+        areaFillSetup.register();
     }
 
     static void registerSetupCreator(String setupId, setupCreator creator) {