Too high version
SuriveAUT opened this issue ยท 3 comments
[20:55:31 ERROR]: Could not load 'plugins/MultiplayerHardcore-1.0.0b1.jar' in folder 'plugins'
org.bukkit.plugin.InvalidPluginException: java.lang.UnsupportedClassVersionError: de/diepixelecke/mphc/MultiplayerHardcore has been compiled by a more recent version of the Java Runtime (class file version 55.0), this version of the Java Runtime only recognizes class file versions up to 52.0
at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.java:141) ~[patched_1.16.5.jar:git-Paper-674]
at org.bukkit.plugin.SimplePluginManager.loadPlugin(SimplePluginManager.java:397) ~[patched_1.16.5.jar:git-Paper-674]
at org.bukkit.plugin.SimplePluginManager.loadPlugins(SimplePluginManager.java:305) ~[patched_1.16.5.jar:git-Paper-674]
at org.bukkit.craftbukkit.v1_16_R3.CraftServer.loadPlugins(CraftServer.java:389) ~[patched_1.16.5.jar:git-Paper-674]
at net.minecraft.server.v1_16_R3.DedicatedServer.init(DedicatedServer.java:252) ~[patched_1.16.5.jar:git-Paper-674]
at net.minecraft.server.v1_16_R3.MinecraftServer.w(MinecraftServer.java:1066) ~[patched_1.16.5.jar:git-Paper-674]
at net.minecraft.server.v1_16_R3.MinecraftServer.lambda$a$0(MinecraftServer.java:290) ~[patched_1.16.5.jar:git-Paper-674]
at java.lang.Thread.run(Thread.java:748) [?:1.8.0_282]
Caused by: java.lang.UnsupportedClassVersionError: de/diepixelecke/mphc/MultiplayerHardcore has been compiled by a more recent version of the Java Runtime (class file version 55.0), this version of the Java Runtime only recognizes class file versions up to 52.0
at java.lang.ClassLoader.defineClass1(Native Method) ~[?:1.8.0_282]
at java.lang.ClassLoader.defineClass(ClassLoader.java:756) ~[?:1.8.0_282]
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142) ~[?:1.8.0_282]
at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:178) ~[patched_1.16.5.jar:git-Paper-674]
at org.bukkit.plugin.java.JavaPluginLoader.getClassByName(JavaPluginLoader.java:216) ~[patched_1.16.5.jar:git-Paper-674]
at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:122) ~[patched_1.16.5.jar:git-Paper-674]
at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:111) ~[patched_1.16.5.jar:git-Paper-674]
at java.lang.ClassLoader.loadClass(ClassLoader.java:418) ~[?:1.8.0_282]
at java.lang.ClassLoader.loadClass(ClassLoader.java:351) ~[?:1.8.0_282]
at java.lang.Class.forName0(Native Method) ~[?:1.8.0_282]
at java.lang.Class.forName(Class.java:348) ~[?:1.8.0_282]
at org.bukkit.plugin.java.PluginClassLoader.(PluginClassLoader.java:79) ~[patched_1.16.5.jar:git-Paper-674]
at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.java:137) ~[patched_1.16.5.jar:git-Paper-674]
... 7 more
As mentioned on the BukkitDev page, you need at least Java 11 to run the plugin. Looks like you're still on Java 8.
(I'll add that info to the GitHub Readme as well.)