The latest dev build not working on 1.21.11

[moshendian]

Minecraft's Version

purpur1.21.11
folia1.21.11

Plugin's Version

WildChests-2026.1-b113

Describe the bug

[17:40:44 INFO]: [WildChests] The plugin doesn't support your minecraft version.
[17:40:44 INFO]: [WildChests] Please try a different version.
[17:40:44 WARN]: com.bgsoftware.wildchests.libs.com.bgsoftware.common.nmsloader.NMSLoadException: An error occurred while loading nms jar
[17:40:44 WARN]: at WildChests-2026.1-b113.jar//com.bgsoftware.wildchests.libs.com.bgsoftware.common.nmsloader.method.BuiltinNMSHandlersFactoryMethod$BuiltinNMSLoader.findImplementationClass(BuiltinNMSHandlersFactoryMethod.java:67)
[17:40:44 WARN]: at WildChests-2026.1-b113.jar//com.bgsoftware.wildchests.libs.com.bgsoftware.common.nmsloader.internal.BaseNMSLoader.loadNMSHandler(BaseNMSLoader.java:19)
[17:40:44 WARN]: at WildChests-2026.1-b113.jar//com.bgsoftware.wildchests.WildChestsPlugin.loadNMSAdapter(WildChestsPlugin.java:159)
[17:40:44 WARN]: at WildChests-2026.1-b113.jar//com.bgsoftware.wildchests.WildChestsPlugin.onLoad(WildChestsPlugin.java:62)
[17:40:44 WARN]: at io.papermc.paper.plugin.storage.ServerPluginProviderStorage.processProvided(ServerPluginProviderStorage.java:59)
[17:40:44 WARN]: at io.papermc.paper.plugin.storage.ServerPluginProviderStorage.processProvided(ServerPluginProviderStorage.java:18)
[17:40:44 WARN]: at io.papermc.paper.plugin.storage.SimpleProviderStorage.enter(SimpleProviderStorage.java:39)
[17:40:44 WARN]: at io.papermc.paper.plugin.entrypoint.LaunchEntryPointHandler.enter(LaunchEntryPointHandler.java:39)
[17:40:44 WARN]: at org.bukkit.craftbukkit.CraftServer.loadPlugins(CraftServer.java:569)
[17:40:44 WARN]: at net.minecraft.server.dedicated.DedicatedServer.initServer(DedicatedServer.java:363)
[17:40:44 WARN]: at net.minecraft.server.MinecraftServer.runServer(MinecraftServer.java:1273)
[17:40:44 WARN]: at net.minecraft.server.MinecraftServer.lambda$spin$2(MinecraftServer.java:392)
[17:40:44 WARN]: at java.base/java.lang.Thread.run(Thread.java:1583)
[17:40:44 WARN]: Caused by: java.io.IOException: Failed to rename plugins\WildChests.cache.paper-remapped\unknown-origin\v1_21_10-1778262042043.jar to plugins\WildChests.cache\v1_21_10.jar
[17:40:44 WARN]: at WildChests-2026.1-b113.jar//com.bgsoftware.wildchests.libs.com.bgsoftware.common.nmsloader.method.BuiltinNMSHandlersFactoryMethod$BuiltinNMSLoader.loadNMSToRuntime(BuiltinNMSHandlersFactoryMethod.java:106)
[17:40:44 WARN]: at WildChests-2026.1-b113.jar//com.bgsoftware.wildchests.libs.com.bgsoftware.common.nmsloader.method.BuiltinNMSHandlersFactoryMethod$BuiltinNMSLoader.(BuiltinNMSHandlersFactoryMethod.java:61)
[17:40:44 WARN]: at WildChests-2026.1-b113.jar//com.bgsoftware.wildchests.libs.com.bgsoftware.common.nmsloader.method.BuiltinNMSHandlersFactoryMethod.createNMSLoader(BuiltinNMSHandlersFactoryMethod.java:45)
[17:40:44 WARN]: at WildChests-2026.1-b113.jar//com.bgsoftware.wildchests.libs.com.bgsoftware.common.nmsloader.NMSHandlersFactory.createNMSLoader(NMSHandlersFactory.java:43)
[17:40:44 WARN]: at WildChests-2026.1-b113.jar//com.bgsoftware.wildchests.libs.com.bgsoftware.common.nmsloader.NMSHandlersFactory.createNMSLoader(NMSHandlersFactory.java:29)
[17:40:44 WARN]: at WildChests-2026.1-b113.jar//com.bgsoftware.wildchests.WildChestsPlugin.loadNMSAdapter(WildChestsPlugin.java:158)
[17:40:44 WARN]: ... 10 more

To Reproduce

Run server on MC 1.21.11 and load the latest dev build

Additional Information

No response

[OmerBenGera]

Can you send me your entire logs file?
I can't seem to replicate it and I suspect it has something to do with your setup.

[moshendian]

Starting org.bukkit.craftbukkit.Main
[16:39:32 INFO]: [bootstrap] Running Java 21 (Java HotSpot(TM) 64-Bit Server VM 21.0.9+7-LTS-338; Oracle Corporation null) on Windows Server 2022 10.0 (amd64)
[16:39:32 INFO]: [bootstrap] Loading Purpur 1.21.11-2559-HEAD@33b2924 (2026-01-20T21:53:47Z) for Minecraft 1.21.11
[16:39:32 INFO]: [PluginInitializerManager] Initializing plugins...
[16:39:32 INFO]: [PluginRemapper] Remapping plugin 'plugins\WildChests-2026.1-b113.jar'...
[16:39:33 INFO]: [PluginRemapper] Done remapping plugin 'plugins\WildChests-2026.1-b113.jar' in 488ms.
[16:39:33 INFO]: [PluginInitializerManager] Initialized 1 plugin
[16:39:33 INFO]: [PluginInitializerManager] Bukkit plugins (1):

• WildChests (2026.1-b113)
  [16:39:36 INFO]: Environment: Environment[sessionHost=https://sessionserver.mojang.com, servicesHost=https://api.minecraftservices.com, profilesHost=https://api.mojang.com, name=PROD]
  [16:39:37 INFO]: Loaded 1470 recipes
  [16:39:37 INFO]: Loaded 1584 advancements
  [16:39:37 INFO]: [ca.spottedleaf.dataconverter.minecraft.datatypes.MCTypeRegistry] Initialising converters for DataConverter...
  [16:39:38 INFO]: [ca.spottedleaf.dataconverter.minecraft.datatypes.MCTypeRegistry] Finished initialising converters for DataConverter in 222.6ms
  [16:39:38 INFO]: Starting minecraft server version 1.21.11
  [16:39:38 WARN]: ****************************
  [16:39:38 WARN]: YOU ARE RUNNING THIS SERVER AS AN ADMINISTRATIVE OR ROOT USER. THIS IS NOT ADVISED.
  [16:39:38 WARN]: YOU ARE OPENING YOURSELF UP TO POTENTIAL RISKS WHEN DOING THIS.
  [16:39:38 WARN]: FOR MORE INFORMATION, SEE https://madelinemiller.dev/blog/root-minecraft-server/
  [16:39:38 WARN]: ****************************
  [16:39:38 INFO]: Loading properties
  [16:39:38 INFO]: This server is running Purpur version 1.21.11-2559-HEAD@33b2924 (2026-01-20T21:53:47Z) (Implementing API version 1.21.11-R0.1-SNAPSHOT)
  [16:39:38 INFO]: [spark] This server bundles the spark profiler. For more information please visit https://docs.papermc.io/paper/profiling
  [16:39:38 INFO]: Server Ping Player Sample Count: 12
  [16:39:38 INFO]: Using 4 threads for Netty based IO
  [16:39:38 INFO]: [MoonriseCommon] Paper is using 8 worker threads, 1 I/O threads
  [16:39:38 INFO]: Default game type: SURVIVAL
  [16:39:38 INFO]: Generating keypair
  [16:39:38 INFO]: Starting Minecraft server on 127.0.0.1:2101
  [16:39:39 INFO]: Paper: Using Java compression from Velocity.
  [16:39:39 INFO]: Paper: Using Java cipher from Velocity.
  [16:39:39 INFO]: [WildChests] Loading server plugin WildChests v2026.1-b113
  [16:39:39 INFO]: [ReobfServer] Remapping server...
  [16:39:42 INFO]: [ReobfServer] Done remapping server in 2600ms.
  [16:39:42 INFO]: [PluginRemapper] Remapping plugin 'plugins\WildChests.cache\v1_21_10.jar'...
  [16:39:42 INFO]: [PluginRemapper] Done remapping plugin 'plugins\WildChests.cache\v1_21_10.jar' in 48ms.
  [16:39:42 INFO]: [WildChests] The plugin doesn't support your minecraft version.
  [16:39:42 INFO]: [WildChests] Please try a different version.
  [16:39:42 WARN]: com.bgsoftware.wildchests.libs.com.bgsoftware.common.nmsloader.NMSLoadException: An error occurred while loading nms jar
  [16:39:42 WARN]: at WildChests-2026.1-b113.jar//com.bgsoftware.wildchests.libs.com.bgsoftware.common.nmsloader.method.BuiltinNMSHandlersFactoryMethod$BuiltinNMSLoader.findImplementationClass(BuiltinNMSHandlersFactoryMethod.java:67)
  [16:39:42 WARN]: at WildChests-2026.1-b113.jar//com.bgsoftware.wildchests.libs.com.bgsoftware.common.nmsloader.internal.BaseNMSLoader.loadNMSHandler(BaseNMSLoader.java:19)
  [16:39:42 WARN]: at WildChests-2026.1-b113.jar//com.bgsoftware.wildchests.WildChestsPlugin.loadNMSAdapter(WildChestsPlugin.java:159)
  [16:39:42 WARN]: at WildChests-2026.1-b113.jar//com.bgsoftware.wildchests.WildChestsPlugin.onLoad(WildChestsPlugin.java:62)
  [16:39:42 WARN]: at io.papermc.paper.plugin.storage.ServerPluginProviderStorage.processProvided(ServerPluginProviderStorage.java:59)
  [16:39:42 WARN]: at io.papermc.paper.plugin.storage.ServerPluginProviderStorage.processProvided(ServerPluginProviderStorage.java:18)
  [16:39:42 WARN]: at io.papermc.paper.plugin.storage.SimpleProviderStorage.enter(SimpleProviderStorage.java:39)
  [16:39:42 WARN]: at io.papermc.paper.plugin.entrypoint.LaunchEntryPointHandler.enter(LaunchEntryPointHandler.java:39)
  [16:39:42 WARN]: at org.bukkit.craftbukkit.CraftServer.loadPlugins(CraftServer.java:569)
  [16:39:42 WARN]: at net.minecraft.server.dedicated.DedicatedServer.initServer(DedicatedServer.java:363)
  [16:39:42 WARN]: at net.minecraft.server.MinecraftServer.runServer(MinecraftServer.java:1273)
  [16:39:42 WARN]: at net.minecraft.server.MinecraftServer.lambda$spin$2(MinecraftServer.java:392)
  [16:39:42 WARN]: at java.base/java.lang.Thread.run(Thread.java:1583)
  [16:39:42 WARN]: Caused by: java.io.IOException: Failed to rename plugins\WildChests.cache.paper-remapped\unknown-origin\v1_21_10-1778344779488.jar to plugins\WildChests.cache\v1_21_10.jar
  [16:39:42 WARN]: at WildChests-2026.1-b113.jar//com.bgsoftware.wildchests.libs.com.bgsoftware.common.nmsloader.method.BuiltinNMSHandlersFactoryMethod$BuiltinNMSLoader.loadNMSToRuntime(BuiltinNMSHandlersFactoryMethod.java:106)
  [16:39:42 WARN]: at WildChests-2026.1-b113.jar//com.bgsoftware.wildchests.libs.com.bgsoftware.common.nmsloader.method.BuiltinNMSHandlersFactoryMethod$BuiltinNMSLoader.(BuiltinNMSHandlersFactoryMethod.java:61)
  [16:39:42 WARN]: at WildChests-2026.1-b113.jar//com.bgsoftware.wildchests.libs.com.bgsoftware.common.nmsloader.method.BuiltinNMSHandlersFactoryMethod.createNMSLoader(BuiltinNMSHandlersFactoryMethod.java:45)
  [16:39:42 WARN]: at WildChests-2026.1-b113.jar//com.bgsoftware.wildchests.libs.com.bgsoftware.common.nmsloader.NMSHandlersFactory.createNMSLoader(NMSHandlersFactory.java:43)
  [16:39:42 WARN]: at WildChests-2026.1-b113.jar//com.bgsoftware.wildchests.libs.com.bgsoftware.common.nmsloader.NMSHandlersFactory.createNMSLoader(NMSHandlersFactory.java:29)
  [16:39:42 WARN]: at WildChests-2026.1-b113.jar//com.bgsoftware.wildchests.WildChestsPlugin.loadNMSAdapter(WildChestsPlugin.java:158)
  [16:39:42 WARN]: ... 10 more
  [16:39:42 INFO]: Server permissions file permissions.yml is empty, ignoring it
  [16:39:42 WARN]: **** SERVER IS RUNNING IN OFFLINE/INSECURE MODE!
  [16:39:42 WARN]: The server will make no attempt to authenticate usernames. Beware.
  [16:39:42 WARN]: Whilst this makes it possible to use Velocity, unless access to your server is properly restricted, it also opens up the ability for hackers to connect with any username they choose.
  [16:39:42 WARN]: Please see https://docs.papermc.io/velocity/security for further information.
  [16:39:42 WARN]: To change this, set "online-mode" to "true" in the server.properties file.
  [16:39:42 INFO]: Preparing level "world"
  [16:39:42 INFO]: Forcing world upgrade! world
  [16:39:42 INFO]: Counting chunks...
  [16:39:42 INFO]: Upgrading entities
  [16:39:42 INFO]: Upgrading POIs
  [16:39:42 INFO]: Upgrading blocks
  [16:39:42 INFO]: World optimizaton finished after 0 seconds
  [16:39:43 INFO]: Forcing world upgrade! world_nether
  [16:39:43 INFO]: Counting chunks...
  [16:39:43 INFO]: Upgrading entities
  [16:39:43 INFO]: Upgrading POIs
  [16:39:43 INFO]: Upgrading blocks
  [16:39:43 INFO]: World optimizaton finished after 0 seconds
  [16:39:44 INFO]: Forcing world upgrade! world_the_end
  [16:39:44 INFO]: Counting chunks...
  [16:39:44 INFO]: Upgrading entities
  [16:39:44 INFO]: Upgrading POIs
  [16:39:44 INFO]: Upgrading blocks
  [16:39:44 INFO]: World optimizaton finished after 0 seconds
  [16:39:45 INFO]: Loading 0 persistent chunks for world 'minecraft:overworld'...
  [16:39:45 INFO]: Prepared spawn area in 1 ms
  [16:39:45 INFO]: Loading 0 persistent chunks for world 'minecraft:the_nether'...
  [16:39:45 INFO]: Prepared spawn area in 1 ms
  [16:39:45 INFO]: Loading 0 persistent chunks for world 'minecraft:the_end'...
  [16:39:45 INFO]: Prepared spawn area in 2 ms
  [16:39:45 INFO]: Done preparing level "world" (3.451s)
  [16:39:45 INFO]: [WildChests] Enabling WildChests v2026.1-b113
  [16:39:45 INFO]: [spark] Starting background profiler...
  [16:39:45 INFO]: [spark] The async-profiler engine is not supported for your os/arch (windowsserver2022/amd64), so the built-in Java engine will be used instead.
  [16:39:45 INFO]: Running delayed init tasks
  [16:39:45 INFO]: Done (14.305s)! For help, type "help"

This is the full log for Purpur 1.21.11. I also tried Folia 1.21.11 and encountered the exact same issue.

[moshendian]

Can you send me your entire logs file? I can't seem to replicate it and I suspect it has something to do with your setup.

Additionally, I've tested WildChests-2026.1-b111 and WildChests-2026.1-b110, and both work perfectly fine.
This issue starts occurring in versions WildChests-2026.1-b112 and WildChests-2026.1-b113.

[OmerBenGera]

Check out latest dev build, hopefully fixed.