[18:02:41 ERROR]: Error occurred while enabling FoxyMachines vDEV - 12 (git 869a3081) (Is it up to date?)
java.lang.IncompatibleClassChangeError: Implementing class
        at java.lang.ClassLoader.defineClass1(Native Method) ~[?:1.8.0_281]
        at java.lang.ClassLoader.defineClass(Unknown Source) ~[?:1.8.0_281]
        at java.security.SecureClassLoader.defineClass(Unknown Source) ~[?:1.8.0_281]
        at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:178) ~[patched_1.16.5.jar:git-Paper-487]
        at org.bukkit.plugin.java.JavaPluginLoader.getClassByName(JavaPluginLoader.java:216) ~[patched_1.16.5.jar:git-Paper-487]
        at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:122) ~[patched_1.16.5.jar:git-Paper-487]
        at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:111) ~[patched_1.16.5.jar:git-Paper-487]
        at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.8.0_281]
        at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.8.0_281]
        at me.gallowsdove.foxymachines.ItemSetup.init(Setup.java:39) ~[?:?]
        at me.gallowsdove.foxymachines.FoxyMachines.onEnable(FoxyMachines.java:24) ~[?:?]
        at org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPlugin.java:263) ~[patched_1.16.5.jar:git-Paper-487]
        at org.bukkit.plugin.java.JavaPluginLoader.enablePlugin(JavaPluginLoader.java:380) ~[patched_1.16.5.jar:git-Paper-487]
        at org.bukkit.plugin.SimplePluginManager.enablePlugin(SimplePluginManager.java:483) ~[patched_1.16.5.jar:git-Paper-487]
        at org.bukkit.craftbukkit.v1_16_R3.CraftServer.enablePlugin(CraftServer.java:500) ~[patched_1.16.5.jar:git-Paper-487]
        at org.bukkit.craftbukkit.v1_16_R3.CraftServer.enablePlugins(CraftServer.java:414) ~[patched_1.16.5.jar:git-Paper-487]
        at net.minecraft.server.v1_16_R3.MinecraftServer.loadWorld(MinecraftServer.java:465) ~[patched_1.16.5.jar:git-Paper-487]
        at net.minecraft.server.v1_16_R3.DedicatedServer.init(DedicatedServer.java:239) ~[patched_1.16.5.jar:git-Paper-487]
        at net.minecraft.server.v1_16_R3.MinecraftServer.w(MinecraftServer.java:936) ~[patched_1.16.5.jar:git-Paper-487]
        at net.minecraft.server.v1_16_R3.MinecraftServer.lambda$a$0(MinecraftServer.java:174) ~[patched_1.16.5.jar:git-Paper-487]
        at java.lang.Thread.run(Unknown Source) [?:1.8.0_281]