org.bukkit.plugin.InvalidPluginException: java.lang.UnsupportedClassVersionError: com/extendedclip/deluxemenus/DeluxeMenus 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:149) ~[server.jar:3096a-Spigot-9fb885e-af1a232]
at org.bukkit.plugin.SimplePluginManager.loadPlugin(SimplePluginManager.java:394) ~[server.jar:3096a-Spigot-9fb885e-af1a232]
at org.bukkit.plugin.SimplePluginManager.loadPlugins(SimplePluginManager.java:301) ~[server.jar:3096a-Spigot-9fb885e-af1a232]
at org.bukkit.craftbukkit.v1_16_R3.CraftServer.loadPlugins(CraftServer.java:381) ~[server.jar:3096a-Spigot-9fb885e-af1a232]
at net.minecraft.server.v1_16_R3.DedicatedServer.init(DedicatedServer.java:224) ~[server.jar:3096a-Spigot-9fb885e-af1a232]
at net.minecraft.server.v1_16_R3.MinecraftServer.w(MinecraftServer.java:928) ~[server.jar:3096a-Spigot-9fb885e-af1a232]
at net.minecraft.server.v1_16_R3.MinecraftServer.lambda$0(MinecraftServer.java:273) ~[server.jar:3096a-Spigot-9fb885e-af1a232]
at java.lang.Thread.run(Unknown Source) [?:1.8.0_391]
#UnsupportedClassVersionError
1 messages · Page 1 of 1 (latest)
Possible Solution Found:
The plugin (or program) you are trying to use was compiled using a newer Java version than the one you using.
To find what version you need, start from 52 which is Java 8 and for example, 60 is Java 16. (8 + 8 = 16 => 52 + 8 = 60)
Barry's solution finder is still in BETA and will make mistakes.
Just idk how to switch from jre-8 to jdk-16(17 or 21)