Internal Exception: java.lang.NoClassDefFoundError: Could not initialize class org.inventivetalent.glow .reflection.minecraft.Minecraft

[backryun]

What steps will reproduce the problem?

1. set the server default and start it.
2. use minecraft JE 1.15.2 Vanilla version and login to server.
3. then, the server won`t login and error message come out.

What were you expecting to happen? What happened instead?

can`t login to server when this plugin active.

What version of the plugin are you using? Type /version <Plugin Name>

1.11.0-SNAPSHOT

What Spigot version are you using? Type /version

1.15.2 (spigot recent version)

What plugins ae you using? Type /plugins

only AdvancedSlabs.

Do you have an error log? Use pastebin.com. If you're not sure, upload your whole server log

[WHEN I CONNECT SERVER situation log]

[14:22:39 INFO]: [ReflectionHelper] I am loaded from package org.inventivetalent.glow.reflection.minecraft [14:22:39 WARN]: [ReflectionHelper] Failed to find version enum for 'org.bukkit.craftbukkit.v1_15_R1'/'v1_15_R1.' [14:22:39 INFO]: [ReflectionHelper] Generating dynamic constant... [14:22:39 ERROR]: Could not pass event PlayerJoinEvent to AdvancedSlabs v1.11.0-SNAPSHOT java.lang.NoClassDefFoundError: sun/reflect/ConstructorAccessor at org.inventivetalent.glow.reflection.minecraft.Minecraft.newEnumInstance(Minecraft.java:219) ~[?:?] at org.inventivetalent.glow.reflection.minecraft.Minecraft$Version.getVersion(Minecraft.java:184) ~[?:?] at org.inventivetalent.glow.reflection.minecraft.Minecraft.(Minecraft.java:34) ~[?:?] at org.inventivetalent.glow.reflection.resolver.minecraft.NMSClassResolver.resolve(NMSClassResolver.java:15) ~[?:?] at org.inventivetalent.glow.GlowAPI$Color.(GlowAPI.java:427) ~[?:?] at org.inventivetalent.glow.GlowAPI$Color.(GlowAPI.java:403) ~[?:?] at org.inventivetalent.glow.GlowAPI.initTeam(GlowAPI.java:320) ~[?:?] at org.inventivetalent.glow.GlowAPI.initTeam(GlowAPI.java:331) ~[?:?] at org.inventivetalent.glow.GlowAPI.onJoin(GlowAPI.java:524) ~[?:?] at com.destroystokyo.paper.event.executor.asm.generated.GeneratedEventExecutor4.execute(Unknown Source) ~[?:?] at org.bukkit.plugin.EventExecutor.lambda$create$1(EventExecutor.java:69) ~[patched_1.15.2.jar:git-Paper-226] at co.aikar.timings.TimedEventExecutor.execute(TimedEventExecutor.java:80) ~[patched_1.15.2.jar:git-Paper-226] at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:70) ~[patched_1.15.2.jar:git-Paper-226] at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:607) ~[patched_1.15.2.jar:git-Paper-226] at net.minecraft.server.v1_15_R1.PlayerList.postChunkLoadJoin(PlayerList.java:232) ~[patched_1.15.2.jar:git-Paper-226] at net.minecraft.server.v1_15_R1.PlayerList.lambda$a$0(PlayerList.java:172) ~[patched_1.15.2.jar:git-Paper-226] at net.minecraft.server.v1_15_R1.ChunkProviderServer.lambda$null$3(ChunkProviderServer.java:184) ~[patched_1.15.2.jar:git-Paper-226] at net.minecraft.server.v1_15_R1.PlayerChunkMap$CallbackExecutor.run(PlayerChunkMap.java:112) ~[patched_1.15.2.jar:git-Paper-226] at net.minecraft.server.v1_15_R1.ChunkProviderServer$a.executeNext(ChunkProviderServer.java:1052) ~[patched_1.15.2.jar:git-Paper-226] at net.minecraft.server.v1_15_R1.ChunkProviderServer$a.midTickLoadChunks(ChunkProviderServer.java:1029) ~[patched_1.15.2.jar:git-Paper-226 ] at net.minecraft.server.v1_15_R1.MinecraftServer.midTickLoadChunks(MinecraftServer.java:1050) ~[patched_1.15.2.jar:git-Paper-226] at net.minecraft.server.v1_15_R1.MinecraftServer.lambda$a$5(MinecraftServer.java:1149) ~[patched_1.15.2.jar:git-Paper-226] at net.minecraft.server.v1_15_R1.IAsyncTaskHandler.awaitTasks(IAsyncTaskHandler.java:118) ~[patched_1.15.2.jar:git-Paper-226] at net.minecraft.server.v1_15_R1.MinecraftServer.a(MinecraftServer.java:1148) ~[patched_1.15.2.jar:git-Paper-226] at net.minecraft.server.v1_15_R1.MinecraftServer.run(MinecraftServer.java:946) ~[patched_1.15.2.jar:git-Paper-226] at java.lang.Thread.run(Thread.java:834) [?:?] Caused by: java.lang.ClassNotFoundException: sun.reflect.ConstructorAccessor at java.net.URLClassLoader.findClass(URLClassLoader.java:471) ~[?:?] at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:171) ~[patched_1.15.2.jar:git-Paper-226] at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:100) ~[patched_1.15.2.jar:git-Paper-226] at java.lang.ClassLoader.loadClass(ClassLoader.java:589) ~[?:?] at java.lang.ClassLoader.loadClass(ClassLoader.java:522) ~[?:?] ... 26 more [14:22:39 INFO]: backryun joined the game [14:22:39 INFO]: backryun[/59.22.85.133:1084] logged in with entity id 41 at ([world]174.9367178662486, 44.5, 115.66504742233533) [14:22:40 INFO]: backryun lost connection: Internal Exception: java.lang.NoClassDefFoundError: Could not initialize class org.inventivetalent.glow.reflection.minecraft.Minecraft [14:22:40 INFO]: backryun left the game

Did your client crash? Upload errors in .minecraft/logs/latest.log as well

client say: Internal Exception: java.lang.NoClassDefFoundError: Could not initialize class org.inventivetalent.glow.reflection.minecraft.Minecraft

Additional information? (Are you using Bungeecord? Did it work in previous versions? etc.)

i opened server on Ubuntu LTS 20.04 server editon, JAVA 11 and paper(spigot)server client.

i already tried craftbukkit, spigot,paper. all program comes out same error.