Crash on 1.21.7

[robertosu]

The server simply shut down throwing this error, tested on a fresh Paper install, 1.21.7 (last dev build).

java.lang.Throwable: java.lang.NoSuchMethodError: 'net.minecraft.world.level.LevelAccessor de.derfrzocker.custom.ore.generator.impl.v1_21_R5.ChunkAccessImpl.getWorld()'
        at ca.spottedleaf.moonrise.patches.chunk_system.scheduling.ChunkTaskScheduler.unrecoverableChunkSystemFailure(ChunkTaskScheduler.java:314) ~[purpur-1.21.7.jar:1.21.7-2475-c4e5604]
        at ca.spottedleaf.moonrise.patches.chunk_system.scheduling.NewChunkHolder.lambda$setGenerationTask$5(NewChunkHolder.java:1629) ~[purpur-1.21.7.jar:1.21.7-2475-c4e5604]
        at ca.spottedleaf.moonrise.patches.chunk_system.scheduling.task.ChunkProgressionTask.complete0(ChunkProgressionTask.java:91) ~[purpur-1.21.7.jar:1.21.7-2475-c4e5604]
        at ca.spottedleaf.moonrise.patches.chunk_system.scheduling.task.ChunkProgressionTask.complete(ChunkProgressionTask.java:74) ~[purpur-1.21.7.jar:1.21.7-2475-c4e5604]
        at ca.spottedleaf.moonrise.patches.chunk_system.scheduling.task.ChunkUpgradeGenericStatusTask.run(ChunkUpgradeGenericStatusTask.java:116) ~[purpur-1.21.7.jar:1.21.7-2475-c4e5604]
        at ca.spottedleaf.moonrise.patches.chunk_system.scheduling.executor.RadiusAwarePrioritisedExecutor$Task.run(RadiusAwarePrioritisedExecutor.java:492) ~[purpur-1.21.7.jar:1.21.7-2475-c4e5604]
        at ca.spottedleaf.concurrentutil.executor.queue.PrioritisedTaskQueue$PrioritisedQueuedTask.execute(PrioritisedTaskQueue.java:281) ~[concurrentutil-0.0.3.jar:?]
        at ca.spottedleaf.concurrentutil.executor.queue.PrioritisedTaskQueue.executeTask(PrioritisedTaskQueue.java:101) ~[concurrentutil-0.0.3.jar:?]
        at ca.spottedleaf.concurrentutil.executor.thread.PrioritisedThreadPool$ExecutorGroup$ThreadPoolExecutor.executeTask(PrioritisedThreadPool.java:533) ~[concurrentutil-0.0.3.jar:?]
        at ca.spottedleaf.concurrentutil.executor.thread.PrioritisedThreadPool$PrioritisedThread.pollTasks(PrioritisedThreadPool.java:354) ~[concurrentutil-0.0.3.jar:?]
        at ca.spottedleaf.concurrentutil.executor.thread.PrioritisedQueueExecutorThread.doRun(PrioritisedQueueExecutorThread.java:60) ~[concurrentutil-0.0.3.jar:?]
        at ca.spottedleaf.concurrentutil.executor.thread.PrioritisedQueueExecutorThread.run(PrioritisedQueueExecutorThread.java:49) ~[concurrentutil-0.0.3.jar:?]
Caused by: java.lang.NoSuchMethodError: 'net.minecraft.world.level.LevelAccessor de.derfrzocker.custom.ore.generator.impl.v1_21_R5.ChunkAccessImpl.getWorld()'
        at custom-ore-generator-2025.07.13.jar/de.derfrzocker.custom.ore.generator.impl.v1_21_R5.ChunkAccessImpl.getHeight(ChunkAccessImpl.java:65) ~[custom-ore-generator-2025.07.13.jar:?]
        at net.minecraft.world.level.levelgen.feature.OreFeature.place(OreFeature.java:46) ~[purpur-1.21.7.jar:1.21.7-2475-c4e5604]
        at custom-ore-generator-2025.07.13.jar/de.derfrzocker.custom.ore.generator.impl.v1_21_R5.oregenerator.MinableGenerator_v1_21_R5.generate(MinableGenerator_v1_21_R5.java:96) ~[custom-ore-generator-2025.07.13.jar:?]
        at custom-ore-generator-2025.07.13.jar/de.derfrzocker.custom.ore.generator.impl.v1_21_R5.CustomOrePopulator.generate(CustomOrePopulator.java:141) ~[custom-ore-generator-2025.07.13.jar:?]
        at custom-ore-generator-2025.07.13.jar/de.derfrzocker.custom.ore.generator.impl.v1_21_R5.CustomOrePopulator.lambda$populate$2(CustomOrePopulator.java:91) ~[custom-ore-generator-2025.07.13.jar:?]
        at java.base/java.util.Arrays$ArrayList.forEach(Arrays.java:4263) ~[?:?]
        at custom-ore-generator-2025.07.13.jar/de.derfrzocker.custom.ore.generator.impl.v1_21_R5.CustomOrePopulator.lambda$populate$3(CustomOrePopulator.java:91) ~[custom-ore-generator-2025.07.13.jar:?]
        at java.base/java.lang.Iterable.forEach(Iterable.java:75) ~[?:?]
        at custom-ore-generator-2025.07.13.jar/de.derfrzocker.custom.ore.generator.impl.v1_21_R5.CustomOrePopulator.populate(CustomOrePopulator.java:88) ~[custom-ore-generator-2025.07.13.jar:?]
        at net.minecraft.world.level.chunk.ChunkGenerator.applyBiomeDecoration(ChunkGenerator.java:456) ~[purpur-1.21.7.jar:1.21.7-2475-c4e5604]
        at net.minecraft.world.level.chunk.ChunkGenerator.applyBiomeDecoration(ChunkGenerator.java:439) ~[purpur-1.21.7.jar:1.21.7-2475-c4e5604]
        at net.minecraft.world.level.chunk.status.ChunkStatusTasks.generateFeatures(ChunkStatusTasks.java:150) ~[purpur-1.21.7.jar:1.21.7-2475-c4e5604]
        at net.minecraft.world.level.chunk.status.ChunkStep.apply(ChunkStep.java:66) ~[purpur-1.21.7.jar:1.21.7-2475-c4e5604]
        at ca.spottedleaf.moonrise.patches.chunk_system.scheduling.task.ChunkUpgradeGenericStatusTask.run(ChunkUpgradeGenericStatusTask.java:99) ~[purpur-1.21.7.jar:1.21.7-2475-c4e5604]
        ... 7 more

[Harineko0]

same here (paper 1.21.7)