gradle.properties

@@ -31,7 +31,7 @@ mod_name=NaturesAura
 # The license of the mod. Review your options at https://choosealicense.com/. All Rights Reserved is the default.
 mod_license=MIT
 # The mod version. See https://semver.org/
-mod_version=41.3
+mod_version=41.2
 # The group ID for the mod. It is only important when publishing as an artifact to a Maven repository.
 # This should match the base package used for the mod sources.
 # See https://maven.apache.org/guides/mini/guide-naming-conventions.html

src/main/java/de/ellpeck/naturesaura/compat/jei/JEINaturesAuraPlugin.java

@@ -57,8 +57,7 @@ public class JEINaturesAuraPlugin implements IModPlugin {
 
             @Override
             public String getLegacyStringSubtypeInfo(ItemStack ingredient, UidContext context) {
-                var effect = ItemEffectPowder.getEffect(ingredient);
-                return effect != null ? effect.toString() : "";
+                return ItemEffectPowder.getEffect(ingredient).toString();
             }
         });
         registration.registerSubtypeInterpreter(VanillaTypes.ITEM_STACK, ModItems.AURA_BOTTLE, new ISubtypeInterpreter<>() {

src/main/resources/data/naturesaura/recipe/book.json

@@ -16,7 +16,7 @@
     ],
     "result": {
         "id": "patchouli:guide_book",
-        "components": {
+        "nbt": {
             "patchouli:book": "naturesaura:book"
         }
     }