>.... [12:41:11 ERROR]: Could not pass event EntityDeathEvent to MysticCore v1.6
java.lang.NoClassDefFoundError: me/samgameryt/mysticboosters/MysticBoosters
at me.samgameryt.mysticcore.listeners.UserListener.onKill(UserListener.java:38) ~[?:?]
at com.destroystokyo.paper.event.executor.asm.generated.GeneratedEventExecutor384.execute(Unknown Source) ~[?:?]
at org.bukkit.plugin.EventExecutor.lambda$create$1(EventExecutor.java:69) ~[server.jar:git-Craftimize-"0971e3f"]
at co.aikar.timings.TimedEventExecutor.execute(TimedEventExecutor.java:76) ~[server.jar:git-Craftimize-"0971e3f"]
at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:70) ~[server.jar:git-Craftimize-"0971e3f"]
at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:559) ~[server.jar:git-Craftimize-"0971e3f"]
at org.bukkit.craftbukkit.v1_15_R1.event.CraftEventFactory.callEntityDeathEvent(CraftEventFactory.java:759) ~[server.jar:git-Craftimize-"0971e3f"]
at net.minecraft.server.v1_15_R1.EntityLiving.d(EntityLiving.java:1385) ~[server.jar:git-Craftimize-"0971e3f"]
at net.minecraft.server.v1_15_R1.EntityLiving.die(EntityLiving.java:1313) ~[server.jar:git-Craftimize-"0971e3f"]
at net.minecraft.server.v1_15_R1.EntityLiving.damageEntity(EntityLiving.java:1157) ~[server.jar:git-Craftimize-"0971e3f"]
at net.minecraft.server.v1_15_R1.EntityMonster.damageEntity(EntityMonster.java:52) ~[server.jar:git-Craftimize-"0971e3f"]
at net.minecraft.server.v1_15_R1.EntityZombie.damageEntity(EntityZombie.java:318) ~[server.jar:git-Craftimize-"0971e3f"]
at net.minecraft.server.v1_15_R1.EntityHuman.attack(EntityHuman.java:1118) ~[server.jar:git-Craftimize-"0971e3f"]
at net.minecraft.server.v1_15_R1.EntityPlayer.attack(EntityPlayer.java:1702) ~[server.jar:git-Craftimize-"0971e3f"]
at net.minecraft.server.v1_15_R1.PlayerConnection.a(PlayerConnection.java:2064) ~[server.jar:git-Craftimize-"0971e3f"]
at net.minecraft.server.v1_15_R1.PacketPlayInUseEntity.a(PacketPlayInUseEntity.java:51) ~[server.jar:git-Craftimize-"0971e3f"]
at net.minecraft.server.v1_15_R1.PacketPlayInUseEntity.a(PacketPlayInUseEntity.java:6) ~[server.jar:git-Craftimize-"0971e3f"]
at net.minecraft.server.v1_15_R1.PlayerConnectionUtils.lambda$ensureMainThread$0(PlayerConnectionUtils.java:19) ~[server.jar:git-Craftimize-"0971e3f"]
at net.minecraft.server.v1_15_R1.TickTask.run(SourceFile:18) ~[server.jar:git-Craftimize-"0971e3f"]
at net.minecraft.server.v1_15_R1.IAsyncTaskHandler.executeTask(IAsyncTaskHandler.java:136) ~[server.jar:git-Craftimize-"0971e3f"]
at net.minecraft.server.v1_15_R1.IAsyncTaskHandlerReentrant.executeTask(SourceFile:23) ~[server.jar:git-Craftimize-"0971e3f"]
at net.minecraft.server.v1_15_R1.IAsyncTaskHandler.executeNext(IAsyncTaskHandler.java:109) ~[server.jar:git-Craftimize-"0971e3f"]
at net.minecraft.server.v1_15_R1.MinecraftServer.ba(MinecraftServer.java:1060) ~[server.jar:git-Craftimize-"0971e3f"]
at net.minecraft.server.v1_15_R1.MinecraftServer.executeNext(MinecraftServer.java:1053) ~[server.jar:git-Craftimize-"0971e3f"]
at net.minecraft.server.v1_15_R1.IAsyncTaskHandler.awaitTasks(IAsyncTaskHandler.java:119) ~[server.jar:git-Craftimize-"0971e3f"]
at net.minecraft.server.v1_15_R1.MinecraftServer.sleepForTick(MinecraftServer.java:1037) ~[server.jar:git-Craftimize-"0971e3f"]
at net.minecraft.server.v1_15_R1.MinecraftServer.run(MinecraftServer.java:961) ~[server.jar:git-Craftimize-"0971e3f"]
at java.lang.Thread.run(Thread.java:834) [?:?]