Im getting a error when updating my server from 1.20.4 to 1.21, im not sure if are problem for my server or not, im using LoneLibs 1.0.56 and ItemsAdder_4.0.2-alpha-test-3
[12:54:27 ERROR]: [ItemsAdder] Error initializing plugin 'ItemsAdder_4.0.2-alpha-test-3 (2).jar' in folder 'plugins/.paper-remapped' (Is it up to date?)
java.lang.NullPointerException: Cannot read field "protocol" because the return value of "lonelibs.dev.lone.fastnbt.nms.Version.get()" is null
at LoneLibs.jar/lonelibs.dev.lone.fastnbt.nms.Version.isOlderThan(Version.java:87) \~[LoneLibs.jar:?]
at ItemsAdder_4.0.2-alpha-test-3 (2).jar/ia.m.Q.Q(SourceFile:450) \~[ItemsAdder_4.0.2-alpha-test-3 (2).jar:?]
at ItemsAdder_4.0.2-alpha-test-3 (2).jar/dev.lone.itemsadder.Main.iU(SourceFile:542) \~[ItemsAdder_4.0.2-alpha-test-3 (2).jar:?]
at ItemsAdder_4.0.2-alpha-test-3 (2).jar/dev.lone.itemsadder.Main.onLoad(SourceFile:176) \~[ItemsAdder_4.0.2-alpha-test-3 (2).jar:?]
at io.papermc.paper.plugin.storage.ServerPluginProviderStorage.processProvided(ServerPluginProviderStorage.java:59) \~[pufferfish-1.21.1.jar:1.21.1-10-f05b0e9]
at io.papermc.paper.plugin.storage.ServerPluginProviderStorage.processProvided(ServerPluginProviderStorage.java:18) \~[pufferfish-1.21.1.jar:1.21.1-10-f05b0e9]
at io.papermc.paper.plugin.storage.SimpleProviderStorage.enter(SimpleProviderStorage.java:39) \~[pufferfish-1.21.1.jar:1.21.1-10-f05b0e9]
at io.papermc.paper.plugin.entrypoint.LaunchEntryPointHandler.enter(LaunchEntryPointHandler.java:40) \~[pufferfish-1.21.1.jar:1.21.1-10-f05b0e9]
at org.bukkit.craftbukkit.CraftServer.loadPlugins(CraftServer.java:546) \~[pufferfish-1.21.1.jar:1.21.1-10-f05b0e9]
at net.minecraft.server.dedicated.DedicatedServer.initServer(DedicatedServer.java:294) \~[pufferfish-1.21.1.jar:1.21.1-10-f05b0e9]
at net.minecraft.server.MinecraftServer.runServer(MinecraftServer.java:1216) \~[pufferfish-1.21.1.jar:1.21.1-10-f05b0e9]
at net.minecraft.server.MinecraftServer.lambda$spin$0(MinecraftServer.java:331) \~[pufferfish-1.21.1.jar:1.21.1-10-f05b0e9]
at java.base/java.lang.Thread.run(Thread.java:1583) \~[?:?]
