This error is poping up on mine server

[dudibuby]

java.lang.RuntimeException: Could not execute entrypoint stage 'main' due to errors, provided by 'schmucks'!
at net.fabricmc.loader.entrypoint.minecraft.hooks.EntrypointUtils.invoke0(EntrypointUtils.java:50) ~[minecraft_server.jar:?]
at net.fabricmc.loader.entrypoint.minecraft.hooks.EntrypointUtils.invoke(EntrypointUtils.java:33) ~[minecraft_server.jar:?]
at net.fabricmc.loader.entrypoint.minecraft.hooks.EntrypointServer.start(EntrypointServer.java:33) ~[minecraft_server.jar:?]
at net.minecraft.server.Main.main(Main.java:92) [intermediary-server.jar:?]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_261]
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[?:1.8.0_261]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_261]
at java.lang.reflect.Method.invoke(Method.java:498) ~[?:1.8.0_261]
at net.fabricmc.loader.game.MinecraftGameProvider.launch(MinecraftGameProvider.java:234) [minecraft_server.jar:?]
at net.fabricmc.loader.launch.knot.Knot.launch(Knot.java:153) [minecraft_server.jar:?]
at net.fabricmc.loader.launch.knot.KnotServer.main(KnotServer.java:28) [minecraft_server.jar:?]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_261]
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[?:1.8.0_261]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_261]
at java.lang.reflect.Method.invoke(Method.java:498) ~[?:1.8.0_261]
at net.fabricmc.loader.launch.server.FabricServerLauncher.launch(FabricServerLauncher.java:68) [minecraft_server.jar:?]
at net.fabricmc.loader.launch.server.FabricServerLauncher.setup(FabricServerLauncher.java:114) [minecraft_server.jar:?]
at net.fabricmc.loader.launch.server.FabricServerLauncher.main(FabricServerLauncher.java:56) [minecraft_server.jar:?]
Caused by: java.lang.ExceptionInInitializerError
at java.lang.Class.forName0(Native Method) ~[?:1.8.0_261]
at java.lang.Class.forName(Class.java:348) ~[?:1.8.0_261]
at net.fabricmc.loader.util.DefaultLanguageAdapter.create(DefaultLanguageAdapter.java:50) ~[minecraft_server.jar:?]
at net.fabricmc.loader.EntrypointStorage$NewEntry.lambda$getOrCreate$0(EntrypointStorage.java:106) ~[minecraft_server.jar:?]
at java.util.HashMap.computeIfAbsent(HashMap.java:1127) ~[?:1.8.0_261]
at net.fabricmc.loader.EntrypointStorage$NewEntry.getOrCreate(EntrypointStorage.java:104) ~[minecraft_server.jar:?]
at net.fabricmc.loader.EntrypointStorage.lambda$getEntrypointContainers$1(EntrypointStorage.java:191) ~[minecraft_server.jar:?]
at net.fabricmc.loader.entrypoint.EntrypointContainerImpl.getEntrypoint(EntrypointContainerImpl.java:37) ~[minecraft_server.jar:?]
at net.fabricmc.loader.entrypoint.minecraft.hooks.EntrypointUtils.invoke0(EntrypointUtils.java:47) ~[minecraft_server.jar:?]
... 17 more
Caused by: java.lang.NullPointerException
at me.shedaniel.autoconfig.ConfigManager.load(ConfigManager.java:106) ~[cloth-config-4.11.26-fabric.jar:?]
at me.shedaniel.autoconfig.ConfigManager.(ConfigManager.java:53) ~[cloth-config-4.11.26-fabric.jar:?]
at me.shedaniel.autoconfig.AutoConfig.register(AutoConfig.java:66) ~[cloth-config-4.11.26-fabric.jar:?]
at com.alotofletters.schmucks.config.SchmucksConfig.init(SchmucksConfig.java:67) ~[Schmucks-1.16.5-1.3.2.jar:?]
at com.alotofletters.schmucks.Schmucks.(Schmucks.java:41) ~[Schmucks-1.16.5-1.3.2.jar:?]
at java.lang.Class.forName0(Native Method) ~[?:1.8.0_261]
at java.lang.Class.forName(Class.java:348) ~[?:1.8.0_261]
at net.fabricmc.loader.util.DefaultLanguageAdapter.create(DefaultLanguageAdapter.java:50) ~[minecraft_server.jar:?]
at net.fabricmc.loader.EntrypointStorage$NewEntry.lambda$getOrCreate$0(EntrypointStorage.java:106) ~[minecraft_server.jar:?]
at java.util.HashMap.computeIfAbsent(HashMap.java:1127) ~[?:1.8.0_261]
at net.fabricmc.loader.EntrypointStorage$NewEntry.getOrCreate(EntrypointStorage.java:104) ~[minecraft_server.jar:?]
at net.fabricmc.loader.EntrypointStorage.lambda$getEntrypointContainers$1(EntrypointStorage.java:191) ~[minecraft_server.jar:?]
at net.fabricmc.loader.entrypoint.EntrypointContainerImpl.getEntrypoint(EntrypointContainerImpl.java:37) ~[minecraft_server.jar:?]
at net.fabricmc.loader.entrypoint.minecraft.hooks.EntrypointUtils.invoke0(EntrypointUtils.java:47) ~[minecraft_server.jar:?]
... 17 more