Помощь Не работает itemadder

Не работает Itemsadder 3.4.1b. Использую ядро PaperMC 1.19.3. Выдает такую ошибку:

Error occurred while enabling ItemsAdder v3.4.1b (Is it up to date?)
java.lang.NoClassDefFoundError: Could not initialize class ia.m.I
    at dev.lone.itemsadder.Main.onEnable(SourceFile:432) ~[ItemsAdder_3.4.1b.jar:?]
    at org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPlugin.java:279) ~[paper-api-1.19.3-R0.1-SNAPSHOT.jar:?]
    at io.papermc.paper.plugin.manager.PaperPluginInstanceManager.enablePlugin(PaperPluginInstanceManager.java:192) ~[paper-1.19.3.jar:git-Paper-448]
    at io.papermc.paper.plugin.manager.PaperPluginManagerImpl.enablePlugin(PaperPluginManagerImpl.java:104) ~[paper-1.19.3.jar:git-Paper-448]
    at org.bukkit.plugin.SimplePluginManager.enablePlugin(SimplePluginManager.java:507) ~[paper-api-1.19.3-R0.1-SNAPSHOT.jar:?]
    at org.bukkit.craftbukkit.v1_19_R2.CraftServer.enablePlugin(CraftServer.java:560) ~[paper-1.19.3.jar:git-Paper-448]
    at org.bukkit.craftbukkit.v1_19_R2.CraftServer.enablePlugins(CraftServer.java:471) ~[paper-1.19.3.jar:git-Paper-448]
    at net.minecraft.server.MinecraftServer.loadWorld0(MinecraftServer.java:635) ~[paper-1.19.3.jar:git-Paper-448]
    at net.minecraft.server.MinecraftServer.loadLevel(MinecraftServer.java:434) ~[paper-1.19.3.jar:git-Paper-448]
    at net.minecraft.server.dedicated.DedicatedServer.initServer(DedicatedServer.java:308) ~[paper-1.19.3.jar:git-Paper-448]
    at net.minecraft.server.MinecraftServer.runServer(MinecraftServer.java:1101) ~[paper-1.19.3.jar:git-Paper-448]
    at net.minecraft.server.MinecraftServer.lambda$spin$0(MinecraftServer.java:316) ~[paper-1.19.3.jar:git-Paper-448]
    at java.lang.Thread.run(Thread.java:833) ~[?:?]

Что делать?

 

Прошу помочь.

 

Пиши пожалуйста в обсуждение ресурса.

 

@Милена, хорошо