diff --git a/src/main/java/xyz/alexcrea/cuanvil/api/ConflictAPI.java b/src/main/java/xyz/alexcrea/cuanvil/api/ConflictAPI.java
index 7a07392..667fc6d 100644
--- a/src/main/java/xyz/alexcrea/cuanvil/api/ConflictAPI.java
+++ b/src/main/java/xyz/alexcrea/cuanvil/api/ConflictAPI.java
@@ -9,7 +9,9 @@ import xyz.alexcrea.cuanvil.config.ConfigHolder;
 import xyz.alexcrea.cuanvil.group.EnchantConflictGroup;
 import xyz.alexcrea.cuanvil.gui.config.global.EnchantConflictGui;
 
-import java.util.*;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.List;
 
 /**
  * Custom Anvil api for conflict registry.
@@ -56,7 +58,8 @@ public class ConflictAPI {
         ConfigHolder.CONFLICT_HOLDER.getConflictManager().addConflict(conflict);
 
         // Add conflict to gui
-        EnchantConflictGui.INSTANCE.updateValueForGeneric(conflict, true);
+        EnchantConflictGui conflictGui = EnchantConflictGui.getCurrentInstance();
+        if(conflictGui != null) conflictGui.updateValueForGeneric(conflict, true);
 
         return true;
     }
@@ -137,7 +140,9 @@ public class ConflictAPI {
         prepareSaveTask();
 
         // Remove from gui
-        EnchantConflictGui.INSTANCE.removeGeneric(conflict);
+        EnchantConflictGui conflictGui = EnchantConflictGui.getCurrentInstance();
+        if(conflictGui != null) conflictGui.removeGeneric(conflict);
+
 
         return true;
     }
@@ -162,14 +167,16 @@ public class ConflictAPI {
 
         reloadChangeTask = Bukkit.getScheduler().scheduleSyncDelayedTask(CustomAnvil.instance, ()->{
             ConfigHolder.CONFLICT_HOLDER.reload();
-            EnchantConflictGui.INSTANCE.reloadValues();
+            EnchantConflictGui conflictGui = EnchantConflictGui.getCurrentInstance();
+            if(conflictGui != null) conflictGui.reloadValues();
+
             reloadChangeTask = -1;
         }, 0L);
 
     }
 
     static void logConflictOrigin(@NotNull ConflictBuilder builder){
-        CustomAnvil.instance.getLogger().warning("Conflict " + builder.getName() +" came from " + builder.getSourceName() + ".");
+        CustomAnvil.instance.getLogger().warning("Conflict " + builder.getName() + " came from " + builder.getSourceName() + ".");
     }
 
     /**
diff --git a/src/main/java/xyz/alexcrea/cuanvil/api/CustomAnvilRecipeApi.java b/src/main/java/xyz/alexcrea/cuanvil/api/CustomAnvilRecipeApi.java
index e5172f8..ed628fe 100644
--- a/src/main/java/xyz/alexcrea/cuanvil/api/CustomAnvilRecipeApi.java
+++ b/src/main/java/xyz/alexcrea/cuanvil/api/CustomAnvilRecipeApi.java
@@ -72,7 +72,8 @@ public class CustomAnvilRecipeApi {
         prepareSaveTask();
 
         // Add from gui
-        CustomRecipeConfigGui.INSTANCE.updateValueForGeneric(recipe, true);
+        CustomRecipeConfigGui recipeConfigGui = CustomRecipeConfigGui.getCurrentInstance();
+        if(recipeConfigGui != null) recipeConfigGui.updateValueForGeneric(recipe, true);
 
         return true;
     }
@@ -92,7 +93,8 @@ public class CustomAnvilRecipeApi {
         prepareSaveTask();
 
         // Remove from gui
-        CustomRecipeConfigGui.INSTANCE.removeGeneric(recipe);
+        CustomRecipeConfigGui recipeConfigGui = CustomRecipeConfigGui.getCurrentInstance();
+        if(recipeConfigGui != null) recipeConfigGui.removeGeneric(recipe);
 
         return true;
     }
diff --git a/src/main/java/xyz/alexcrea/cuanvil/api/MaterialGroupApi.java b/src/main/java/xyz/alexcrea/cuanvil/api/MaterialGroupApi.java
index 0cbb650..ca061ba 100644
--- a/src/main/java/xyz/alexcrea/cuanvil/api/MaterialGroupApi.java
+++ b/src/main/java/xyz/alexcrea/cuanvil/api/MaterialGroupApi.java
@@ -60,7 +60,8 @@ public class MaterialGroupApi {
         if(!writeMaterialGroup(group, false)) return false;
 
         if(group instanceof IncludeGroup includeGroup){
-            GroupConfigGui.INSTANCE.updateValueForGeneric(includeGroup, true);
+            GroupConfigGui configGui = GroupConfigGui.getCurrentInstance();
+            if(configGui != null) configGui.updateValueForGeneric(includeGroup, true);
         }
 
         if(ConfigOptions.INSTANCE.getVerboseDebugLog()){
@@ -168,7 +169,8 @@ public class MaterialGroupApi {
 
         // Remove from gui
         if(group instanceof IncludeGroup includeGroup){
-            GroupConfigGui.INSTANCE.removeGeneric(includeGroup);
+            GroupConfigGui configGui = GroupConfigGui.getCurrentInstance();
+            if(configGui != null) configGui.removeGeneric(includeGroup);
         }
 
         return true;
@@ -194,7 +196,10 @@ public class MaterialGroupApi {
 
         reloadChangeTask = Bukkit.getScheduler().scheduleSyncDelayedTask(CustomAnvil.instance, ()->{
             ConfigHolder.ITEM_GROUP_HOLDER.reload();
-            GroupConfigGui.INSTANCE.reloadValues();
+
+            GroupConfigGui configGui = GroupConfigGui.getCurrentInstance();
+            if(configGui != null) configGui.reloadValues();
+
             reloadChangeTask = -1;
         }, 0L);
 
diff --git a/src/main/java/xyz/alexcrea/cuanvil/gui/config/MainConfigGui.java b/src/main/java/xyz/alexcrea/cuanvil/gui/config/MainConfigGui.java
index b6c1062..db4da89 100644
--- a/src/main/java/xyz/alexcrea/cuanvil/gui/config/MainConfigGui.java
+++ b/src/main/java/xyz/alexcrea/cuanvil/gui/config/MainConfigGui.java
@@ -82,7 +82,7 @@ public class MainConfigGui extends ChestGui {
         enchantConflictMeta.setLore(Collections.singletonList("\u00A77Click here to open enchantment conflict menu"));
         enchantConflictItemstack.setItemMeta(enchantConflictMeta);
 
-        GuiItem enchantConflictItem = GuiGlobalItems.goToGuiItem(enchantConflictItemstack, EnchantConflictGui.INSTANCE);
+        GuiItem enchantConflictItem = GuiGlobalItems.goToGuiItem(enchantConflictItemstack, EnchantConflictGui.getInstance());
         pane.bindItem('4', enchantConflictItem);
 
         // Group config items
@@ -94,7 +94,7 @@ public class MainConfigGui extends ChestGui {
         groupMeta.setLore(Collections.singletonList("\u00A77Click here to open material group menu"));
         groupItemstack.setItemMeta(groupMeta);
 
-        GuiItem groupConfigItem = GuiGlobalItems.goToGuiItem(groupItemstack, GroupConfigGui.INSTANCE);
+        GuiItem groupConfigItem = GuiGlobalItems.goToGuiItem(groupItemstack, GroupConfigGui.getInstance());
 
         pane.bindItem('5', groupConfigItem);
 
@@ -107,7 +107,7 @@ public class MainConfigGui extends ChestGui {
         unitRepairMeta.setLore(Collections.singletonList("\u00A77Click here to open anvil unit repair menu"));
         unirRepairItemstack.setItemMeta(unitRepairMeta);
 
-        GuiItem unitRepairItem = GuiGlobalItems.goToGuiItem(unirRepairItemstack, UnitRepairConfigGui.INSTANCE);
+        GuiItem unitRepairItem = GuiGlobalItems.goToGuiItem(unirRepairItemstack, UnitRepairConfigGui.getInstance());
         pane.bindItem('6', unitRepairItem);
 
         // Custom recipe item
@@ -119,7 +119,7 @@ public class MainConfigGui extends ChestGui {
         customRecipeMeta.setLore(Collections.singletonList("\u00A77Click here to open anvil custom recipe menu"));
         customRecipeItemstack.setItemMeta(customRecipeMeta);
 
-        GuiItem customRecipeItem = GuiGlobalItems.goToGuiItem(customRecipeItemstack, CustomRecipeConfigGui.INSTANCE);
+        GuiItem customRecipeItem = GuiGlobalItems.goToGuiItem(customRecipeItemstack, CustomRecipeConfigGui.getInstance());
         pane.bindItem('7', customRecipeItem);
 
         // quit item
diff --git a/src/main/java/xyz/alexcrea/cuanvil/gui/config/global/CustomRecipeConfigGui.java b/src/main/java/xyz/alexcrea/cuanvil/gui/config/global/CustomRecipeConfigGui.java
index 797a3ab..d8fb9a5 100644
--- a/src/main/java/xyz/alexcrea/cuanvil/gui/config/global/CustomRecipeConfigGui.java
+++ b/src/main/java/xyz/alexcrea/cuanvil/gui/config/global/CustomRecipeConfigGui.java
@@ -5,6 +5,8 @@ import org.bukkit.Material;
 import org.bukkit.inventory.ItemFlag;
 import org.bukkit.inventory.ItemStack;
 import org.bukkit.inventory.meta.ItemMeta;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
 import xyz.alexcrea.cuanvil.config.ConfigHolder;
 import xyz.alexcrea.cuanvil.gui.config.list.MappedGuiListConfigGui;
 import xyz.alexcrea.cuanvil.gui.config.list.elements.CustomRecipeSubSettingGui;
@@ -17,10 +19,18 @@ import java.util.Collection;
 public class CustomRecipeConfigGui extends MappedGuiListConfigGui<AnvilCustomRecipe, CustomRecipeSubSettingGui> {
 
 
-    public final static CustomRecipeConfigGui INSTANCE = new CustomRecipeConfigGui();
+    private static CustomRecipeConfigGui INSTANCE = new CustomRecipeConfigGui();
 
-    static {
-        INSTANCE.init();
+    @Nullable
+    public static CustomRecipeConfigGui getCurrentInstance(){
+        return INSTANCE;
+    }
+
+    @NotNull
+    public static CustomRecipeConfigGui getInstance(){
+        if(INSTANCE == null) INSTANCE = new CustomRecipeConfigGui();
+
+        return INSTANCE;
     }
 
     private CustomRecipeConfigGui() {
diff --git a/src/main/java/xyz/alexcrea/cuanvil/gui/config/global/EnchantConflictGui.java b/src/main/java/xyz/alexcrea/cuanvil/gui/config/global/EnchantConflictGui.java
index c4181df..a582ad0 100644
--- a/src/main/java/xyz/alexcrea/cuanvil/gui/config/global/EnchantConflictGui.java
+++ b/src/main/java/xyz/alexcrea/cuanvil/gui/config/global/EnchantConflictGui.java
@@ -5,6 +5,8 @@ import org.bukkit.configuration.file.FileConfiguration;
 import org.bukkit.inventory.ItemFlag;
 import org.bukkit.inventory.ItemStack;
 import org.bukkit.inventory.meta.ItemMeta;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
 import xyz.alexcrea.cuanvil.config.ConfigHolder;
 import xyz.alexcrea.cuanvil.group.EnchantConflictGroup;
 import xyz.alexcrea.cuanvil.group.IncludeGroup;
@@ -18,14 +20,25 @@ import java.util.Collection;
 
 public class EnchantConflictGui extends MappedGuiListConfigGui<EnchantConflictGroup, EnchantConflictSubSettingGui> {
 
-    public static final EnchantConflictGui INSTANCE = new EnchantConflictGui();
+    private static EnchantConflictGui INSTANCE;
 
-    static {
-        INSTANCE.init();
+    @Nullable
+    public static EnchantConflictGui getCurrentInstance(){
+        return INSTANCE;
     }
 
+    @NotNull
+    public static EnchantConflictGui getInstance(){
+        if(INSTANCE == null) INSTANCE = new EnchantConflictGui();
+
+        return INSTANCE;
+    }
+
+
     private EnchantConflictGui() {
         super( "Conflict Config");
+
+        init();
     }
 
     @Override
diff --git a/src/main/java/xyz/alexcrea/cuanvil/gui/config/global/GroupConfigGui.java b/src/main/java/xyz/alexcrea/cuanvil/gui/config/global/GroupConfigGui.java
index d5fb430..80bbe8c 100644
--- a/src/main/java/xyz/alexcrea/cuanvil/gui/config/global/GroupConfigGui.java
+++ b/src/main/java/xyz/alexcrea/cuanvil/gui/config/global/GroupConfigGui.java
@@ -5,6 +5,8 @@ import org.bukkit.configuration.ConfigurationSection;
 import org.bukkit.inventory.ItemFlag;
 import org.bukkit.inventory.ItemStack;
 import org.bukkit.inventory.meta.ItemMeta;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
 import xyz.alexcrea.cuanvil.config.ConfigHolder;
 import xyz.alexcrea.cuanvil.group.AbstractMaterialGroup;
 import xyz.alexcrea.cuanvil.group.GroupType;
@@ -20,14 +22,24 @@ import java.util.Collection;
 
 public class GroupConfigGui extends MappedGuiListConfigGui<IncludeGroup, GroupConfigSubSettingGui> {
 
-    public final static GroupConfigGui INSTANCE = new GroupConfigGui();
+    private static GroupConfigGui INSTANCE;
 
-    static {
-        INSTANCE.init();
+    @Nullable
+    public static GroupConfigGui getCurrentInstance(){
+        return INSTANCE;
+    }
+
+    @NotNull
+    public static GroupConfigGui getInstance(){
+        if(INSTANCE == null) INSTANCE = new GroupConfigGui();
+
+        return INSTANCE;
     }
 
     public GroupConfigGui() {
         super("Group Config");
+
+        init();
     }
 
     @Override
diff --git a/src/main/java/xyz/alexcrea/cuanvil/gui/config/global/UnitRepairConfigGui.java b/src/main/java/xyz/alexcrea/cuanvil/gui/config/global/UnitRepairConfigGui.java
index 30c5d2e..b1e171e 100644
--- a/src/main/java/xyz/alexcrea/cuanvil/gui/config/global/UnitRepairConfigGui.java
+++ b/src/main/java/xyz/alexcrea/cuanvil/gui/config/global/UnitRepairConfigGui.java
@@ -6,6 +6,8 @@ import org.bukkit.Material;
 import org.bukkit.configuration.ConfigurationSection;
 import org.bukkit.inventory.ItemStack;
 import org.bukkit.inventory.meta.ItemMeta;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
 import xyz.alexcrea.cuanvil.config.ConfigHolder;
 import xyz.alexcrea.cuanvil.gui.config.ask.SelectItemTypeGui;
 import xyz.alexcrea.cuanvil.gui.config.list.MappedGuiListConfigGui;
@@ -18,14 +20,24 @@ import java.util.Collection;
 
 public class UnitRepairConfigGui extends MappedGuiListConfigGui<Material, UnitRepairElementListGui> {
 
-    public static final UnitRepairConfigGui INSTANCE = new UnitRepairConfigGui();
+    private static UnitRepairConfigGui INSTANCE;
 
-    static {
-        INSTANCE.init();
+    @Nullable
+    public static UnitRepairConfigGui getCurrentInstance(){
+        return INSTANCE;
+    }
+
+    @NotNull
+    public static UnitRepairConfigGui getInstance(){
+        if(INSTANCE == null) INSTANCE = new UnitRepairConfigGui();
+
+        return INSTANCE;
     }
 
     private UnitRepairConfigGui() {
         super("Unit Repair Config");
+
+        init();
     }
 
     @Override
diff --git a/src/main/kotlin/io/delilaheve/CustomAnvil.kt b/src/main/kotlin/io/delilaheve/CustomAnvil.kt
index d62d7a2..f2442aa 100644
--- a/src/main/kotlin/io/delilaheve/CustomAnvil.kt
+++ b/src/main/kotlin/io/delilaheve/CustomAnvil.kt
@@ -128,6 +128,10 @@ class CustomAnvil : JavaPlugin() {
         // temporary: handle 1.21 update
         Update_1_21.handleUpdate()
 
+        // Register enchantment of compatible plugin and load configuration change.
+        DependencyManager.handleCompatibilityConfig()
+
+        // Call config event
         val configReadyEvent = CAConfigReadyEvent()
         server.pluginManager.callEvent(configReadyEvent)
 
@@ -135,8 +139,6 @@ class CustomAnvil : JavaPlugin() {
         MainConfigGui.getInstance().init(DependencyManager.packetManager)
         GuiSharedConstant.loadConstants()
 
-        // Register enchantment of compatible plugin and load configuration change.
-        DependencyManager.handleCompatibilityConfig()
     }
 
     fun reloadResource(
diff --git a/src/main/kotlin/xyz/alexcrea/cuanvil/command/ReloadExecutor.kt b/src/main/kotlin/xyz/alexcrea/cuanvil/command/ReloadExecutor.kt
index ca5a205..e49793d 100644
--- a/src/main/kotlin/xyz/alexcrea/cuanvil/command/ReloadExecutor.kt
+++ b/src/main/kotlin/xyz/alexcrea/cuanvil/command/ReloadExecutor.kt
@@ -1,11 +1,15 @@
 package xyz.alexcrea.cuanvil.command
 
 import io.delilaheve.CustomAnvil
+import org.bukkit.Bukkit
 import org.bukkit.command.Command
 import org.bukkit.command.CommandExecutor
 import org.bukkit.command.CommandSender
+import xyz.alexcrea.cuanvil.api.event.CAConfigReadyEvent
 import xyz.alexcrea.cuanvil.config.ConfigHolder
+import xyz.alexcrea.cuanvil.dependency.DependencyManager
 import xyz.alexcrea.cuanvil.gui.config.global.*
+import xyz.alexcrea.cuanvil.update.Update_1_21
 
 class ReloadExecutor : CommandExecutor {
     override fun onCommand(sender: CommandSender, cmd: Command, cmdstr: String, args: Array<out String>): Boolean {
@@ -39,10 +43,20 @@ class ReloadExecutor : CommandExecutor {
             EnchantCostConfigGui.getInstance()?.updateGuiValues()
             EnchantLimitConfigGui.getInstance()?.updateGuiValues()
 
-            EnchantConflictGui.INSTANCE.reloadValues()
-            GroupConfigGui.INSTANCE.reloadValues()
-            UnitRepairConfigGui.INSTANCE.reloadValues()
-            CustomRecipeConfigGui.INSTANCE.reloadValues()
+            EnchantConflictGui.getCurrentInstance()?.reloadValues()
+            GroupConfigGui.getCurrentInstance()?.reloadValues()
+            UnitRepairConfigGui.getCurrentInstance()?.reloadValues()
+            CustomRecipeConfigGui.getCurrentInstance()?.reloadValues()
+
+            // temporary: handle 1.21 update
+            Update_1_21.handleUpdate()
+
+            // Register enchantment of compatible plugin and load configuration change.
+            DependencyManager.handleCompatibilityConfig()
+
+            // Call event
+            val configReadyEvent = CAConfigReadyEvent()
+            Bukkit.getServer().pluginManager.callEvent(configReadyEvent)
 
             return true
         } catch (e: Exception) {