Mythicmobsextension not loading

[BookWyrm114]

Hello, upon starting the server, or attempting to otherwise load mythicmobsextension, I get this error:

[18:48:06 WARN]: Enabled plugin with unregistered PluginClassLoader MythicMobsExtension v1.738c-SNAPSHOT
[18:48:06 INFO]: [MythicMobsExtension] Async chunk loading API found
[18:48:06 INFO]: [MythicMobsExtension] Unable to load externals.ClickListenerMechanic$ClickTracker but continue.
[18:48:06 INFO]: [MythicMobsExtension] Unable to load externals.ClickListenerMechanic but continue.
[18:48:06 INFO]: [MythicMobsExtension] Unable to load externals.ChatListenerMechanic$ChatListener but continue.
[18:48:06 INFO]: [MythicMobsExtension] Unable to load externals.ChatListenerMechanic but continue.
[18:48:06 ERROR]: Error occurred while enabling MythicMobsExtension v1.738c-SNAPSHOT (Is it up to date?)
java.lang.IllegalStateException: zip file closed
at java.util.zip.ZipFile.ensureOpen(ZipFile.java:912) ~[?:?]
at java.util.zip.ZipFile.getEntry(ZipFile.java:347) ~[?:?]
at java.util.zip.ZipFile$1.getEntry(ZipFile.java:1118) ~[?:?]
at java.util.jar.JarFile.getEntry0(JarFile.java:578) ~[?:?]
at java.util.jar.JarFile.getEntry(JarFile.java:508) ~[?:?]
at java.util.jar.JarFile.getJarEntry(JarFile.java:470) ~[?:?]
at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:144) ~[patched_1.16.5.jar:git-Tuinity-"1222573"]
at org.bukkit.plugin.java.JavaPluginLoader.getClassByName(JavaPluginLoader.java:216) ~[patched_1.16.5.jar:git-Tuinity-"1222573"]
at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:122) ~[patched_1.16.5.jar:git-Tuinity-"1222573"]
at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:111) ~[patched_1.16.5.jar:git-Tuinity-"1222573"]
at java.lang.ClassLoader.loadClass(ClassLoader.java:588) ~[?:?]
at java.lang.ClassLoader.loadClass(ClassLoader.java:521) ~[?:?]
at com.gmail.berndivader.mythicmobsext.externals.Externals$ExternalsLoader.load(Externals.java:65) ~[?:?]
at com.gmail.berndivader.mythicmobsext.externals.Externals$ExternalsLoader.(Externals.java:46) ~[?:?]
at com.gmail.berndivader.mythicmobsext.externals.Externals.(Externals.java:40) ~[?:?]
at com.gmail.berndivader.mythicmobsext.Main.onEnable(Main.java:103) ~[?:?]
at org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPlugin.java:263) ~[patched_1.16.5.jar:git-Tuinity-"1222573"]
at org.bukkit.plugin.java.JavaPluginLoader.enablePlugin(JavaPluginLoader.java:380) ~[patched_1.16.5.jar:git-Tuinity-"1222573"]
at org.bukkit.plugin.SimplePluginManager.enablePlugin(SimplePluginManager.java:483) ~[patched_1.16.5.jar:git-Tuinity-"1222573"]
at net.frankheijden.serverutils.bukkit.managers.BukkitPluginManager.enablePlugin(BukkitPluginManager.java:198) ~[?:?]
at net.frankheijden.serverutils.bukkit.managers.BukkitPluginManager.enablePlugin(BukkitPluginManager.java:184) ~[?:?]
at net.frankheijden.serverutils.bukkit.commands.CommandServerUtils.onEnablePlugin(CommandServerUtils.java:226) ~[?:?]
at jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:?]
at jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[?:?]
at jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:?]
at java.lang.reflect.Method.invoke(Method.java:566) ~[?:?]
at net.frankheijden.serverutils.bukkit.dependencies.acf.RegisteredCommand.invoke(RegisteredCommand.java:152) ~[?:?]
at net.frankheijden.serverutils.bukkit.dependencies.acf.BaseCommand.executeCommand(BaseCommand.java:577) ~[?:?]
at net.frankheijden.serverutils.bukkit.dependencies.acf.BaseCommand.execute(BaseCommand.java:513) ~[?:?]
at net.frankheijden.serverutils.bukkit.dependencies.acf.RootCommand.execute(RootCommand.java:99) ~[?:?]
at net.frankheijden.serverutils.bukkit.dependencies.acf.BukkitRootCommand.execute(BukkitRootCommand.java:81) ~[?:?]
at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:159) ~[patched_1.16.5.jar:git-Tuinity-"1222573"]
at org.bukkit.craftbukkit.v1_16_R3.CraftServer.dispatchCommand(CraftServer.java:810) ~[patched_1.16.5.jar:git-Tuinity-"1222573"]
at net.minecraft.server.v1_16_R3.PlayerConnection.handleCommand(PlayerConnection.java:2258) ~[patched_1.16.5.jar:git-Tuinity-"1222573"]
at net.minecraft.server.v1_16_R3.PlayerConnection.c(PlayerConnection.java:2073) ~[patched_1.16.5.jar:git-Tuinity-"1222573"]
at net.minecraft.server.v1_16_R3.PlayerConnection.a(PlayerConnection.java:2026) ~[patched_1.16.5.jar:git-Tuinity-"1222573"]
at net.minecraft.server.v1_16_R3.PacketPlayInChat.a(PacketPlayInChat.java:50) ~[patched_1.16.5.jar:git-Tuinity-"1222573"]
at net.minecraft.server.v1_16_R3.PacketPlayInChat.a(PacketPlayInChat.java:8) ~[patched_1.16.5.jar:git-Tuinity-"1222573"]
at net.minecraft.server.v1_16_R3.PlayerConnectionUtils.lambda$ensureMainThread$1(PlayerConnectionUtils.java:55) ~[patched_1.16.5.jar:git-Tuinity-"1222573"]
at net.minecraft.server.v1_16_R3.TickTask.run(SourceFile:18) ~[patched_1.16.5.jar:git-Tuinity-"1222573"]
at net.minecraft.server.v1_16_R3.IAsyncTaskHandler.executeTask(IAsyncTaskHandler.java:136) ~[patched_1.16.5.jar:git-Tuinity-"1222573"]
at net.minecraft.server.v1_16_R3.IAsyncTaskHandlerReentrant.executeTask(SourceFile:23) ~[patched_1.16.5.jar:git-Tuinity-"1222573"]
at net.minecraft.server.v1_16_R3.IAsyncTaskHandler.executeNext(IAsyncTaskHandler.java:109) ~[patched_1.16.5.jar:git-Tuinity-"1222573"]
at net.minecraft.server.v1_16_R3.MinecraftServer.bb(MinecraftServer.java:1321) ~[patched_1.16.5.jar:git-Tuinity-"1222573"]
at net.minecraft.server.v1_16_R3.MinecraftServer.executeNext(MinecraftServer.java:1314) ~[patched_1.16.5.jar:git-Tuinity-"1222573"]
at net.minecraft.server.v1_16_R3.IAsyncTaskHandler.awaitTasks(IAsyncTaskHandler.java:119) ~[patched_1.16.5.jar:git-Tuinity-"1222573"]
at net.minecraft.server.v1_16_R3.MinecraftServer.sleepForTick(MinecraftServer.java:1290) ~[patched_1.16.5.jar:git-Tuinity-"1222573"]
at net.minecraft.server.v1_16_R3.MinecraftServer.w(MinecraftServer.java:1134) ~[patched_1.16.5.jar:git-Tuinity-"1222573"]
at net.minecraft.server.v1_16_R3.MinecraftServer.lambda$a$0(MinecraftServer.java:290) ~[patched_1.16.5.jar:git-Tuinity-"1222573"]
at java.lang.Thread.run(Thread.java:834) [?:?]
[18:48:06 INFO]: [MythicMobsExtension] Disabling MythicMobsExtension v1.738c-SNAPSHOT

I'm not sure exactly what the problem is, but it may be a problem withe the fork of paper I am using, Yatopia

---

Edit: also here's another error message when it first loads on the server:

[19:33:07 INFO]: [MythicMobsExtension] Enabling MythicMobsExtension v1.738c-SNAPSHOT
[19:33:07 INFO]: [MythicMobsExtension] Async chunk loading API found
[19:33:07 ERROR]: Error occurred while enabling MythicMobsExtension v1.738c-SNAPSHOT (Is it up to date?)
[19:33:07 ERROR]: Suspected Plugins:
[19:33:07 ERROR]: MythicMobsExtension{enabled,ver=1.738c-SNAPSHOT,path=plugins/MythicMobsExtension-1.738c-SNAPSHOT.jar}
[19:33:07 ERROR]: Exception details below:
java.lang.NoClassDefFoundError: io/lumine/xikage/mythicmobs/skills/BuffMechanic$BuffTracker
at java.lang.ClassLoader.defineClass1(Native Method) ~[?:?]
at java.lang.ClassLoader.defineClass(ClassLoader.java:1016) ~[?:?]
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:174) ~[?:?]
at java.net.URLClassLoader.defineClass(URLClassLoader.java:550) ~[?:?]
at java.net.URLClassLoader$1.run(URLClassLoader.java:458) ~[?:?]
at java.net.URLClassLoader$1.run(URLClassLoader.java:452) ~[?:?]
at java.security.AccessController.doPrivileged(Native Method) ~[?:?]
at java.net.URLClassLoader.findClass(URLClassLoader.java:451) ~[?:?]
at java.lang.ClassLoader.loadClass(ClassLoader.java:588) ~[?:?]
at java.net.FactoryURLClassLoader.loadClass(URLClassLoader.java:899) ~[?:?]
at java.lang.ClassLoader.loadClass(ClassLoader.java:521) ~[?:?]
at java.lang.Class.forName0(Native Method) ~[?:?]
at java.lang.Class.forName(Class.java:398) ~[?:?]
at com.gmail.berndivader.mythicmobsext.externals.Externals$ExternalsLoader.loadExt(Externals.java:89) ~[?:?]
at com.gmail.berndivader.mythicmobsext.externals.Externals$ExternalsLoader.load(Externals.java:56) ~[?:?]
at com.gmail.berndivader.mythicmobsext.externals.Externals$ExternalsLoader.(Externals.java:46) ~[?:?]
at com.gmail.berndivader.mythicmobsext.externals.Externals.(Externals.java:40) ~[?:?]
at com.gmail.berndivader.mythicmobsext.Main.onEnable(Main.java:103) ~[?:?]
at org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPlugin.java:263) ~[patched_1.16.5.jar:git-Yatopia-ver/1.16.5-115]
at org.bukkit.plugin.java.JavaPluginLoader.enablePlugin(JavaPluginLoader.java:380) ~[patched_1.16.5.jar:git-Yatopia-ver/1.16.5-115]
at org.bukkit.plugin.SimplePluginManager.enablePlugin(SimplePluginManager.java:483) ~[patched_1.16.5.jar:git-Yatopia-ver/1.16.5-115]
at org.bukkit.craftbukkit.v1_16_R3.CraftServer.enablePlugin(CraftServer.java:501) ~[patched_1.16.5.jar:git-Yatopia-ver/1.16.5-115]
at org.bukkit.craftbukkit.v1_16_R3.CraftServer.enablePlugins(CraftServer.java:415) ~[patched_1.16.5.jar:git-Yatopia-ver/1.16.5-115]
at net.minecraft.server.v1_16_R3.MinecraftServer.loadWorld(MinecraftServer.java:593) ~[patched_1.16.5.jar:git-Yatopia-ver/1.16.5-115]
at net.minecraft.server.v1_16_R3.DedicatedServer.init(DedicatedServer.java:303) ~[patched_1.16.5.jar:git-Yatopia-ver/1.16.5-115]
at net.minecraft.server.v1_16_R3.MinecraftServer.w(MinecraftServer.java:1074) ~[patched_1.16.5.jar:git-Yatopia-ver/1.16.5-115]
at net.minecraft.server.v1_16_R3.MinecraftServer.lambda$a$0(MinecraftServer.java:291) ~[patched_1.16.5.jar:git-Yatopia-ver/1.16.5-115]
at java.lang.Thread.run(Thread.java:834) [?:?]
Caused by: java.lang.ClassNotFoundException: io.lumine.xikage.mythicmobs.skills.BuffMechanic$BuffTracker
at java.net.URLClassLoader.findClass(URLClassLoader.java:471) ~[?:?]
at java.lang.ClassLoader.loadClass(ClassLoader.java:588) ~[?:?]
at java.net.FactoryURLClassLoader.loadClass(URLClassLoader.java:899) ~[?:?]
at java.lang.ClassLoader.loadClass(ClassLoader.java:521) ~[?:?]
... 28 more