[23:26:58] [Server thread/ERROR]: Could not pass event EntityDamageEvent to DuelsBlockBugFix v1.0
java.lang.NoClassDefFoundError: io/papermc/lib/PaperLib
	at me.xemuain.duelsblockbugfix.EntityDamageListener.run(EntityDamageListener.java:37) ~[DuelsBlockBugFix.jar:?]
	at com.destroystokyo.paper.event.executor.MethodHandleEventExecutor.execute(MethodHandleEventExecutor.java:40) ~[paper-api-1.20.4-R0.1-SNAPSHOT.jar:?]
	at co.aikar.timings.TimedEventExecutor.execute(TimedEventExecutor.java:81) ~[paper-api-1.20.4-R0.1-SNAPSHOT.jar:git-Paper-431]
	at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:70) ~[paper-api-1.20.4-R0.1-SNAPSHOT.jar:?]
	at io.papermc.paper.plugin.manager.PaperEventManager.callEvent(PaperEventManager.java:54) ~[paper-1.20.4.jar:git-Paper-431]
	at io.papermc.paper.plugin.manager.PaperPluginManagerImpl.callEvent(PaperPluginManagerImpl.java:126) ~[paper-1.20.4.jar:git-Paper-431]
	at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:615) ~[paper-api-1.20.4-R0.1-SNAPSHOT.jar:?]
	at org.bukkit.craftbukkit.v1_20_R3.event.CraftEventFactory.callEvent(CraftEventFactory.java:265) ~[paper-1.20.4.jar:git-Paper-431]
	at org.bukkit.craftbukkit.v1_20_R3.event.CraftEventFactory.callEntityDamageEvent(CraftEventFactory.java:1203) ~[paper-1.20.4.jar:git-Paper-431]
	at org.bukkit.craftbukkit.v1_20_R3.event.CraftEventFactory.callEntityDamageEvent(CraftEventFactory.java:1188) ~[paper-1.20.4.jar:git-Paper-431]
	at org.bukkit.craftbukkit.v1_20_R3.event.CraftEventFactory.handleEntityDamageEvent(CraftEventFactory.java:1178) ~[paper-1.20.4.jar:git-Paper-431]
	at org.bukkit.craftbukkit.v1_20_R3.event.CraftEventFactory.handleEntityDamageEvent(CraftEventFactory.java:1079) ~[paper-1.20.4.jar:git-Paper-431]
	at org.bukkit.craftbukkit.v1_20_R3.event.CraftEventFactory.handleLivingEntityDamageEvent(CraftEventFactory.java:1237) ~[paper-1.20.4.jar:git-Paper-431]
	at net.minecraft.world.entity.LivingEntity.actuallyHurt(LivingEntity.java:2235) ~[?:?]
	at net.minecraft.world.entity.player.Player.actuallyHurt(Player.java:1062) ~[?:?]
	at net.minecraft.world.entity.LivingEntity.hurt(LivingEntity.java:1472) ~[?:?]
	at net.minecraft.world.entity.player.Player.hurt(Player.java:969) ~[?:?]
	at net.minecraft.server.level.ServerPlayer.hurt(ServerPlayer.java:1135) ~[?:?]
	at net.minecraft.world.entity.LivingEntity.baseTick(LivingEntity.java:417) ~[?:?]
	at net.minecraft.world.entity.Entity.tick(Entity.java:810) ~[paper-1.20.4.jar:git-Paper-431]
	at net.minecraft.world.entity.LivingEntity.tick(LivingEntity.java:3017) ~[?:?]
	at net.minecraft.world.entity.player.Player.tick(Player.java:273) ~[?:?]
	at net.minecraft.server.level.ServerPlayer.doTick(ServerPlayer.java:770) ~[?:?]
	at net.minecraft.server.network.ServerGamePacketListenerImpl.tick(ServerGamePacketListenerImpl.java:338) ~[?:?]
	at net.minecraft.network.Connection.tick(Connection.java:592) ~[?:?]
	at net.minecraft.server.network.ServerConnectionListener.tick(ServerConnectionListener.java:234) ~[?:?]
	at net.minecraft.server.MinecraftServer.tickChildren(MinecraftServer.java:1736) ~[paper-1.20.4.jar:git-Paper-431]
	at net.minecraft.server.dedicated.DedicatedServer.tickChildren(DedicatedServer.java:447) ~[paper-1.20.4.jar:git-Paper-431]
	at net.minecraft.server.MinecraftServer.tickServer(MinecraftServer.java:1515) ~[paper-1.20.4.jar:git-Paper-431]
	at net.minecraft.server.MinecraftServer.runServer(MinecraftServer.java:1216) ~[paper-1.20.4.jar:git-Paper-431]
	at net.minecraft.server.MinecraftServer.lambda$spin$0(MinecraftServer.java:319) ~[paper-1.20.4.jar:git-Paper-431]
	at java.lang.Thread.run(Thread.java:842) ~[?:?]
Caused by: java.lang.ClassNotFoundException: io.papermc.lib.PaperLib
	... 32 more