Error:

[13:55:16 ERROR]: Could not pass event PlayerInteractEvent to Anvil v1.4.10
java.lang.NoClassDefFoundError: org/bukkit/craftbukkit/v1_21_R1/entity/CraftPlayer
at anvil-1.4.10.jar/io.github.explosivemine.anvil.version.Wrapper1_21_R1.getServerPlayer(Wrapper1_21_R1.java:35) ~[anvil-1.4.10.jar:?]
at anvil-1.4.10.jar/io.github.explosivemine.anvil.version.Wrapper1_21_R1.openInventory(Wrapper1_21_R1.java:18) ~[anvil-1.4.10.jar:?]
at anvil-1.4.10.jar/io.github.explosivemine.anvil.menu.type.anvil.AnvilMenu.createInv(AnvilMenu.java:27) ~[anvil-1.4.10.jar:?]
at anvil-1.4.10.jar/io.github.explosivemine.anvil.menu.type.Menu.build(Menu.java:96) ~[anvil-1.4.10.jar:?]
at anvil-1.4.10.jar/io.github.explosivemine.anvil.menu.type.anvil.AnvilMenu.open(AnvilMenu.java:48) ~[anvil-1.4.10.jar:?]
at anvil-1.4.10.jar/io.github.explosivemine.anvil.menu.MenuManager.open(MenuManager.java:51) ~[anvil-1.4.10.jar:?]
at anvil-1.4.10.jar/io.github.explosivemine.anvil.AnvilManager.openAnvil(AnvilManager.java:31) ~[anvil-1.4.10.jar:?]
at anvil-1.4.10.jar/io.github.explosivemine.anvil.AnvilManager.openAnvil(AnvilManager.java:24) ~[anvil-1.4.10.jar:?]
at anvil-1.4.10.jar/io.github.explosivemine.anvil.listeners.PlayerEvents.onPlayerInteract(PlayerEvents.java:42) ~[anvil-1.4.10.jar:?]
at com.destroystokyo.paper.event.executor.asm.generated.GeneratedEventExecutor236.execute(Unknown Source) ~[?:?]
at org.bukkit.plugin.EventExecutor$2.execute(EventExecutor.java:77) ~[purpur-api-1.21.3-R0.1-SNAPSHOT.jar:?]
at co.aikar.timings.TimedEventExecutor.execute(TimedEventExecutor.java:80) ~[purpur-api-1.21.3-R0.1-SNAPSHOT.jar:?]
at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:70) ~[purpur-api-1.21.3-R0.1-SNAPSHOT.jar:?]
at io.papermc.paper.plugin.manager.PaperEventManager.callEvent(PaperEventManager.java:54) ~[purpur-1.21.3.jar:1.21.3-2340-db09358]
at io.papermc.paper.plugin.manager.PaperPluginManagerImpl.callEvent(PaperPluginManagerImpl.java:131) ~[purpur-1.21.3.jar:1.21.3-2340-db09358]
at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:630) ~[purpur-api-1.21.3-R0.1-SNAPSHOT.jar:?]
at org.bukkit.craftbukkit.event.CraftEventFactory.callPlayerInteractEvent(CraftEventFactory.java:603) ~[purpur-1.21.3.jar:1.21.3-2340-db09358]
at net.minecraft.server.level.ServerPlayerGameMode.useItemOn(ServerPlayerGameMode.java:544) ~[purpur-1.21.3.jar:1.21.3-2340-db09358]
at net.minecraft.server.network.ServerGamePacketListenerImpl.handleUseItemOn(ServerGamePacketListenerImpl.java:2034) ~[purpur-1.21.3.jar:1.21.3-2340-db09358]
at net.minecraft.network.protocol.game.ServerboundUseItemOnPacket.handle(ServerboundUseItemOnPacket.java:44) ~[purpur-1.21.3.jar:1.21.3-2340-db09358]
at net.minecraft.network.protocol.game.ServerboundUseItemOnPacket.handle(ServerboundUseItemOnPacket.java:11) ~[purpur-1.21.3.jar:1.21.3-2340-db09358]
at net.minecraft.network.protocol.PacketUtils.lambda$ensureRunningOnSameThread$0(PacketUtils.java:55) ~[purpur-1.21.3.jar:1.21.3-2340-db09358]
at net.minecraft.server.TickTask.run(TickTask.java:18) ~[purpur-1.21.3.jar:1.21.3-2340-db09358]
at net.minecraft.util.thread.BlockableEventLoop.doRunTask(BlockableEventLoop.java:154) ~[purpur-1.21.3.jar:1.21.3-2340-db09358]
at net.minecraft.util.thread.ReentrantBlockableEventLoop.doRunTask(ReentrantBlockableEventLoop.java:24) ~[purpur-1.21.3.jar:1.21.3-2340-db09358]
at net.minecraft.server.MinecraftServer.doRunTask(MinecraftServer.java:1619) ~[purpur-1.21.3.jar:1.21.3-2340-db09358]
at net.minecraft.server.MinecraftServer.doRunTask(MinecraftServer.java:207) ~[purpur-1.21.3.jar:1.21.3-2340-db09358]
at net.minecraft.util.thread.BlockableEventLoop.pollTask(BlockableEventLoop.java:128) ~[purpur-1.21.3.jar:1.21.3-2340-db09358]
at net.minecraft.server.MinecraftServer.pollTaskInternal(MinecraftServer.java:1596) ~[purpur-1.21.3.jar:1.21.3-2340-db09358]
at net.minecraft.server.MinecraftServer.pollTask(MinecraftServer.java:1589) ~[purpur-1.21.3.jar:1.21.3-2340-db09358]
at net.minecraft.util.thread.BlockableEventLoop.managedBlock(BlockableEventLoop.java:138) ~[purpur-1.21.3.jar:1.21.3-2340-db09358]
at net.minecraft.server.MinecraftServer.managedBlock(MinecraftServer.java:1540) ~[purpur-1.21.3.jar:1.21.3-2340-db09358]
at net.minecraft.server.MinecraftServer.waitUntilNextTick(MinecraftServer.java:1550) ~[purpur-1.21.3.jar:1.21.3-2340-db09358]
at net.minecraft.server.MinecraftServer.runServer(MinecraftServer.java:1386) ~[purpur-1.21.3.jar:1.21.3-2340-db09358]
at net.minecraft.server.MinecraftServer.lambda$spin$0(MinecraftServer.java:342) ~[purpur-1.21.3.jar:1.21.3-2340-db09358]
at java.base/java.lang.Thread.run(Thread.java:1583) ~[?:?]
Caused by: java.lang.ClassNotFoundException: org.bukkit.craftbukkit.v1_21_R1.entity.CraftPlayer
... 36 more

This is the only plugin that supports 1.21.1 Paper Anvil Not Too Expensive that I have found on all platforms.

Great Plugin! light and easy to understand
It is an enhancement and a good addition to the minecraft game anvil.

The developers are friendly.
Thanks for developing this awesome plugin

This plugin Can be repaired 1.17 anvil BUG
EX: https://youtu.be/ZNq5XD88aNM

My server use EssentialsXAntiBuild Disable anvil
use anvil plugin replace anvil GUI

Very effective 10/10

All 1.17 servers should be installed.

nice job!

Good plugin. but essentials does this, so it will be even better if you made a custom gui or something!

SUCH AH AMAZING PLUGIN, I RECOMMEND DOWNLOADING AND THE DEV IS SUPER COOL GUY !!!!!!!