Skip to content

Update 1.21.9/10 Not Working

I'm getting this error when trying to startup the latest mythicmobs dev build on my 1.21.9 server

[11:35:55] [Server thread/INFO]: [MythicMobs] Enabling MythicMobs v5.10.1-SNAPSHOT-d28dd4b4
[11:35:55] [Server thread/INFO]: [MythicMobs] Loading MythicMobs for Paper (MC: 1.21.9)...
[11:35:55] [Server thread/INFO]: [MythicMobs] The server is running Paper; enabled Paper exclusive functionality
[11:35:55] [Server thread/ERROR]: Error occurred while enabling MythicMobs v5.10.1-SNAPSHOT-d28dd4b4 (Is it up to date?)
java.lang.NullPointerException: Cannot invoke "io.lumine.mythic.bukkit.utils.version.NMSVersion.toString()" because the return value of "io.lumine.mythic.bukkit.utils.version.ServerVersion.getNMS()" is null
	at MythicMobsPremium-5.10.1-SNAPSHOT.jar/io.lumine.mythic.bukkit.MythicBukkit.getVolatileCodeHandler(MythicBukkit.java:321) ~[MythicMobsPremium-5.10.1-SNAPSHOT.jar:?]
	at MythicMobsPremium-5.10.1-SNAPSHOT.jar/io.lumine.mythic.bukkit.BukkitBootstrap.lambda$initialize$0(BukkitBootstrap.java:100) ~[MythicMobsPremium-5.10.1-SNAPSHOT.jar:?]
	at java.base/java.util.Map.forEach(Map.java:733) ~[?:?]
	at MythicMobsPremium-5.10.1-SNAPSHOT.jar/io.lumine.mythic.bukkit.BukkitBootstrap.initialize(BukkitBootstrap.java:98) ~[MythicMobsPremium-5.10.1-SNAPSHOT.jar:?]
	at MythicMobsPremium-5.10.1-SNAPSHOT.jar/io.lumine.mythic.bukkit.MythicBukkit.enable(MythicBukkit.java:174) ~[MythicMobsPremium-5.10.1-SNAPSHOT.jar:?]
	at MythicMobsPremium-5.10.1-SNAPSHOT.jar/io.lumine.mythic.bukkit.utils.plugin.LuminePlugin.onEnable(LuminePlugin.java:81) ~[MythicMobsPremium-5.10.1-SNAPSHOT.jar:?]
	at org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPlugin.java:279) ~[universe-1.21.9.jar:1.21.9-9e0766f]
	at io.papermc.paper.plugin.manager.PaperPluginInstanceManager.enablePlugin(PaperPluginInstanceManager.java:202) ~[universe-1.21.9.jar:1.21.9-9e0766f]
	at io.papermc.paper.plugin.manager.PaperPluginManagerImpl.enablePlugin(PaperPluginManagerImpl.java:109) ~[universe-1.21.9.jar:1.21.9-9e0766f]
	at org.bukkit.plugin.SimplePluginManager.enablePlugin(SimplePluginManager.java:520) ~[universe-1.21.9.jar:1.21.9-9e0766f]
	at org.bukkit.craftbukkit.CraftServer.enablePlugin(CraftServer.java:645) ~[universe-1.21.9.jar:1.21.9-9e0766f]
	at org.bukkit.craftbukkit.CraftServer.enablePlugins(CraftServer.java:600) ~[universe-1.21.9.jar:1.21.9-9e0766f]
	at net.minecraft.server.MinecraftServer.initPostWorld(MinecraftServer.java:583) ~[universe-1.21.9.jar:1.21.9-9e0766f]
	at net.minecraft.server.dedicated.DedicatedServer.initServer(DedicatedServer.java:378) ~[universe-1.21.9.jar:1.21.9-9e0766f]
	at net.minecraft.server.MinecraftServer.runServer(MinecraftServer.java:1199) ~[universe-1.21.9.jar:1.21.9-9e0766f]
	at net.minecraft.server.MinecraftServer.lambda$spin$2(MinecraftServer.java:356) ~[universe-1.21.9.jar:1.21.9-9e0766f]
	at java.base/java.lang.Thread.run(Thread.java:1447) ~[?:?]
[11:35:55] [Server thread/INFO]: [MythicMobs] Disabling MythicMobs v5.10.1-SNAPSHOT-d28dd4b4
[11:35:55] [Server thread/INFO]: [MythicMobs] ------------------------------------------------------------
[11:35:55] [Server thread/INFO]: [MythicMobs] - 
[11:35:55] [Server thread/INFO]: [MythicMobs] - Unloading Mythic...
[11:35:55] [Server thread/INFO]: [MythicMobs] - 
[11:35:55] [Server thread/INFO]: [MythicMobs] ------------------------------------------------------------
[11:35:55] [Server thread/WARN]: java.lang.NullPointerException: Cannot invoke "io.lumine.mythic.core.mobs.MobExecutor.despawnAllMobs()" because the return value of "io.lumine.mythic.bukkit.MythicBukkit.getMobManager()" is null
[11:35:55] [Server thread/WARN]: 	at MythicMobsPremium-5.10.1-SNAPSHOT.jar//io.lumine.mythic.bukkit.MythicBukkit.disable(MythicBukkit.java:273)
[11:35:55] [Server thread/WARN]: 	at MythicMobsPremium-5.10.1-SNAPSHOT.jar//io.lumine.mythic.bukkit.utils.plugin.LuminePlugin.onDisable(LuminePlugin.java:91)
[11:35:55] [Server thread/WARN]: 	at org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPlugin.java:285)
[11:35:55] [Server thread/WARN]: 	at io.papermc.paper.plugin.manager.PaperPluginInstanceManager.disablePlugin(PaperPluginInstanceManager.java:237)
[11:35:55] [Server thread/WARN]: 	at io.papermc.paper.plugin.manager.PaperPluginManagerImpl.disablePlugin(PaperPluginManagerImpl.java:114)
[11:35:55] [Server thread/WARN]: 	at org.bukkit.plugin.SimplePluginManager.disablePlugin(SimplePluginManager.java:550)
[11:35:55] [Server thread/WARN]: 	at io.papermc.paper.plugin.manager.PaperPluginInstanceManager.enablePlugin(PaperPluginInstanceManager.java:206)
[11:35:55] [Server thread/WARN]: 	at io.papermc.paper.plugin.manager.PaperPluginManagerImpl.enablePlugin(PaperPluginManagerImpl.java:109)
[11:35:55] [Server thread/WARN]: 	at org.bukkit.plugin.SimplePluginManager.enablePlugin(SimplePluginManager.java:520)
[11:35:55] [Server thread/WARN]: 	at org.bukkit.craftbukkit.CraftServer.enablePlugin(CraftServer.java:645)
[11:35:55] [Server thread/WARN]: 	at org.bukkit.craftbukkit.CraftServer.enablePlugins(CraftServer.java:600)
[11:35:55] [Server thread/WARN]: 	at net.minecraft.server.MinecraftServer.initPostWorld(MinecraftServer.java:583)
[11:35:55] [Server thread/WARN]: 	at net.minecraft.server.dedicated.DedicatedServer.initServer(DedicatedServer.java:378)
[11:35:55] [Server thread/WARN]: 	at net.minecraft.server.MinecraftServer.runServer(MinecraftServer.java:1199)
[11:35:55] [Server thread/WARN]: 	at net.minecraft.server.MinecraftServer.lambda$spin$2(MinecraftServer.java:356)
[11:35:55] [Server thread/WARN]: 	at java.base/java.lang.Thread.run(Thread.java:1447)
[11:35:55] [Server thread/INFO]: [MythicMobs] Saving plugin data...
[11:35:55] [Server thread/INFO]: [MythicMobs] ✗An error occurred while saving data
[11:35:55] [Server thread/WARN]: java.lang.NullPointerException: Cannot invoke "io.lumine.mythic.core.mobs.MobExecutor.saveCachedActiveMobs()" because the return value of "io.lumine.mythic.bukkit.MythicBukkit.getMobManager()" is null
[11:35:55] [Server thread/WARN]: 	at MythicMobsPremium-5.10.1-SNAPSHOT.jar//io.lumine.mythic.core.config.ConfigExecutor.save(ConfigExecutor.java:482)
[11:35:55] [Server thread/WARN]: 	at MythicMobsPremium-5.10.1-SNAPSHOT.jar//io.lumine.mythic.core.config.ConfigExecutor.unload(ConfigExecutor.java:513)
[11:35:55] [Server thread/WARN]: 	at MythicMobsPremium-5.10.1-SNAPSHOT.jar//io.lumine.mythic.bukkit.utils.plugin.PluginModule.close(PluginModule.java:50)
[11:35:55] [Server thread/WARN]: 	at MythicMobsPremium-5.10.1-SNAPSHOT.jar//io.lumine.mythic.bukkit.utils.terminable.composite.AbstractCompositeTerminable.close(AbstractCompositeTerminable.java:31)
[11:35:55] [Server thread/WARN]: 	at MythicMobsPremium-5.10.1-SNAPSHOT.jar//io.lumine.mythic.bukkit.utils.terminable.composite.CompositeTerminable.closeAndReportException(CompositeTerminable.java:63)
[11:35:55] [Server thread/WARN]: 	at MythicMobsPremium-5.10.1-SNAPSHOT.jar//io.lumine.mythic.bukkit.utils.plugin.LuminePlugin.close(LuminePlugin.java:100)
[11:35:55] [Server thread/WARN]: 	at MythicMobsPremium-5.10.1-SNAPSHOT.jar//io.lumine.mythic.bukkit.utils.plugin.LuminePlugin.onDisable(LuminePlugin.java:95)
[11:35:55] [Server thread/WARN]: 	at org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPlugin.java:285)
[11:35:55] [Server thread/WARN]: 	at io.papermc.paper.plugin.manager.PaperPluginInstanceManager.disablePlugin(PaperPluginInstanceManager.java:237)
[11:35:55] [Server thread/WARN]: 	at io.papermc.paper.plugin.manager.PaperPluginManagerImpl.disablePlugin(PaperPluginManagerImpl.java:114)
[11:35:55] [Server thread/WARN]: 	at org.bukkit.plugin.SimplePluginManager.disablePlugin(SimplePluginManager.java:550)
[11:35:55] [Server thread/WARN]: 	at io.papermc.paper.plugin.manager.PaperPluginInstanceManager.enablePlugin(PaperPluginInstanceManager.java:206)
[11:35:55] [Server thread/WARN]: 	at io.papermc.paper.plugin.manager.PaperPluginManagerImpl.enablePlugin(PaperPluginManagerImpl.java:109)
[11:35:55] [Server thread/WARN]: 	at org.bukkit.plugin.SimplePluginManager.enablePlugin(SimplePluginManager.java:520)
[11:35:55] [Server thread/WARN]: 	at org.bukkit.craftbukkit.CraftServer.enablePlugin(CraftServer.java:645)
[11:35:55] [Server thread/WARN]: 	at org.bukkit.craftbukkit.CraftServer.enablePlugins(CraftServer.java:600)
[11:35:55] [Server thread/WARN]: 	at net.minecraft.server.MinecraftServer.initPostWorld(MinecraftServer.java:583)
[11:35:55] [Server thread/WARN]: 	at net.minecraft.server.dedicated.DedicatedServer.initServer(DedicatedServer.java:378)
[11:35:55] [Server thread/WARN]: 	at net.minecraft.server.MinecraftServer.runServer(MinecraftServer.java:1199)
[11:35:55] [Server thread/WARN]: 	at net.minecraft.server.MinecraftServer.lambda$spin$2(MinecraftServer.java:356)
[11:35:55] [Server thread/WARN]: 	at java.base/java.lang.Thread.run(Thread.java:1447)
[11:35:55] [Server thread/WARN]: io.lumine.mythic.bukkit.utils.terminable.composite.CompositeClosingException: Exception(s) occurred whilst closing: [java.lang.NullPointerException: Cannot invoke "io.lumine.mythic.core.drops.DropExecutor.unload()" because the return value of "io.lumine.mythic.bukkit.MythicBukkit.getDropManager()" is null]
[11:35:55] [Server thread/WARN]: 	at MythicMobsPremium-5.10.1-SNAPSHOT.jar//io.lumine.mythic.bukkit.utils.terminable.composite.AbstractCompositeTerminable.close(AbstractCompositeTerminable.java:38)
[11:35:55] [Server thread/WARN]: 	at MythicMobsPremium-5.10.1-SNAPSHOT.jar//io.lumine.mythic.bukkit.utils.terminable.composite.CompositeTerminable.closeAndReportException(CompositeTerminable.java:63)
[11:35:55] [Server thread/WARN]: 	at MythicMobsPremium-5.10.1-SNAPSHOT.jar//io.lumine.mythic.bukkit.utils.plugin.LuminePlugin.close(LuminePlugin.java:100)
[11:35:55] [Server thread/WARN]: 	at MythicMobsPremium-5.10.1-SNAPSHOT.jar//io.lumine.mythic.bukkit.utils.plugin.LuminePlugin.onDisable(LuminePlugin.java:95)
[11:35:55] [Server thread/WARN]: 	at org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPlugin.java:285)
[11:35:55] [Server thread/WARN]: 	at io.papermc.paper.plugin.manager.PaperPluginInstanceManager.disablePlugin(PaperPluginInstanceManager.java:237)
[11:35:55] [Server thread/WARN]: 	at io.papermc.paper.plugin.manager.PaperPluginManagerImpl.disablePlugin(PaperPluginManagerImpl.java:114)
[11:35:55] [Server thread/WARN]: 	at org.bukkit.plugin.SimplePluginManager.disablePlugin(SimplePluginManager.java:550)
[11:35:55] [Server thread/WARN]: 	at io.papermc.paper.plugin.manager.PaperPluginInstanceManager.enablePlugin(PaperPluginInstanceManager.java:206)
[11:35:55] [Server thread/WARN]: 	at io.papermc.paper.plugin.manager.PaperPluginManagerImpl.enablePlugin(PaperPluginManagerImpl.java:109)
[11:35:55] [Server thread/WARN]: 	at org.bukkit.plugin.SimplePluginManager.enablePlugin(SimplePluginManager.java:520)
[11:35:55] [Server thread/WARN]: 	at org.bukkit.craftbukkit.CraftServer.enablePlugin(CraftServer.java:645)
[11:35:55] [Server thread/WARN]: 	at org.bukkit.craftbukkit.CraftServer.enablePlugins(CraftServer.java:600)
[11:35:55] [Server thread/WARN]: 	at net.minecraft.server.MinecraftServer.initPostWorld(MinecraftServer.java:583)
[11:35:55] [Server thread/WARN]: 	at net.minecraft.server.dedicated.DedicatedServer.initServer(DedicatedServer.java:378)
[11:35:55] [Server thread/WARN]: 	at net.minecraft.server.MinecraftServer.runServer(MinecraftServer.java:1199)
[11:35:55] [Server thread/WARN]: 	at net.minecraft.server.MinecraftServer.lambda$spin$2(MinecraftServer.java:356)
[11:35:55] [Server thread/WARN]: 	at java.base/java.lang.Thread.run(Thread.java:1447)
[11:35:55] [Server thread/WARN]: java.lang.NullPointerException: Cannot invoke "io.lumine.mythic.core.drops.DropExecutor.unload()" because the return value of "io.lumine.mythic.bukkit.MythicBukkit.getDropManager()" is null
[11:35:55] [Server thread/WARN]: 	at MythicMobsPremium-5.10.1-SNAPSHOT.jar//io.lumine.mythic.core.config.ConfigExecutor.unload(ConfigExecutor.java:515)
[11:35:55] [Server thread/WARN]: 	at MythicMobsPremium-5.10.1-SNAPSHOT.jar//io.lumine.mythic.bukkit.utils.plugin.PluginModule.close(PluginModule.java:50)
[11:35:55] [Server thread/WARN]: 	at MythicMobsPremium-5.10.1-SNAPSHOT.jar//io.lumine.mythic.bukkit.utils.terminable.composite.AbstractCompositeTerminable.close(AbstractCompositeTerminable.java:31)
[11:35:55] [Server thread/WARN]: 	at MythicMobsPremium-5.10.1-SNAPSHOT.jar//io.lumine.mythic.bukkit.utils.terminable.composite.CompositeTerminable.closeAndReportException(CompositeTerminable.java:63)
[11:35:55] [Server thread/WARN]: 	at MythicMobsPremium-5.10.1-SNAPSHOT.jar//io.lumine.mythic.bukkit.utils.plugin.LuminePlugin.close(LuminePlugin.java:100)
[11:35:55] [Server thread/WARN]: 	at MythicMobsPremium-5.10.1-SNAPSHOT.jar//io.lumine.mythic.bukkit.utils.plugin.LuminePlugin.onDisable(LuminePlugin.java:95)
[11:35:55] [Server thread/WARN]: 	at org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPlugin.java:285)
[11:35:55] [Server thread/WARN]: 	at io.papermc.paper.plugin.manager.PaperPluginInstanceManager.disablePlugin(PaperPluginInstanceManager.java:237)
[11:35:55] [Server thread/WARN]: 	at io.papermc.paper.plugin.manager.PaperPluginManagerImpl.disablePlugin(PaperPluginManagerImpl.java:114)
[11:35:55] [Server thread/WARN]: 	at org.bukkit.plugin.SimplePluginManager.disablePlugin(SimplePluginManager.java:550)
[11:35:55] [Server thread/WARN]: 	at io.papermc.paper.plugin.manager.PaperPluginInstanceManager.enablePlugin(PaperPluginInstanceManager.java:206)
[11:35:55] [Server thread/WARN]: 	at io.papermc.paper.plugin.manager.PaperPluginManagerImpl.enablePlugin(PaperPluginManagerImpl.java:109)
[11:35:55] [Server thread/WARN]: 	at org.bukkit.plugin.SimplePluginManager.enablePlugin(SimplePluginManager.java:520)
[11:35:55] [Server thread/WARN]: 	at org.bukkit.craftbukkit.CraftServer.enablePlugin(CraftServer.java:645)
[11:35:55] [Server thread/WARN]: 	at org.bukkit.craftbukkit.CraftServer.enablePlugins(CraftServer.java:600)
[11:35:55] [Server thread/WARN]: 	at net.minecraft.server.MinecraftServer.initPostWorld(MinecraftServer.java:583)
[11:35:55] [Server thread/WARN]: 	at net.minecraft.server.dedicated.DedicatedServer.initServer(DedicatedServer.java:378)
[11:35:55] [Server thread/WARN]: 	at net.minecraft.server.MinecraftServer.runServer(MinecraftServer.java:1199)
[11:35:55] [Server thread/WARN]: 	at net.minecraft.server.MinecraftServer.lambda$spin$2(MinecraftServer.java:356)
[11:35:55] [Server thread/WARN]: 	at java.base/java.lang.Thread.run(Thread.java:1447)